Cleanup: Mark single-parameter constructors as explicit.
Cleanup: Mark single-parameter constructors as explicit.

This should fix the following cpplint.py warning:
Single-parameter constructors should be marked explicit.  [runtime/explicit] [5]

--
Change-Id: I2bf74ced08f86bd5a4e6d57720188327bbd9efe6
Reviewed-on: https://bazel-review.googlesource.com/#/c/1452/
MOS_MIGRATED_REVID=95109413

ButterflyNetwork/bazel,Ansahmadiba/bazel,charlieaustin/bazel,manashmndl/bazel,asarazan/bazel,charlieaustin/bazel,Digas29/bazel,murugamsm/bazel,asarazan/bazel,perezd/bazel,bitemyapp/bazel,ruo91/bazel,xindaya/bazel,zhexuany/bazel,nkhuyu/bazel,ruo91/bazel,meteorcloudy/bazel,dhootha/bazel,kchodorow/bazel,wakashige/bazel,kidaa/bazel,UrbanCompass/bazel,werkt/bazel,katre/bazel,davidzchen/bazel,juhalindfors/bazel-patches,davidzchen/bazel,mikelikespie/bazel,aehlig/bazel,rzagabe/bazel,Digas29/bazel,rohitsaboo/bazel,vt09/bazel,gavares/bazel,juhalindfors/bazel-patches,bitemyapp/bazel,mbrukman/bazel,whuwxl/bazel,bazelbuild/bazel,LuminateWireless/bazel,sicipio/bazel,dhootha/bazel,dropbox/bazel,variac/bazel,ButterflyNetwork/bazel,juhalindfors/bazel-patches,spxtr/bazel,ruo91/bazel,mbrukman/bazel,mikelikespie/bazel,bazelbuild/bazel,zhexuany/bazel,asarazan/bazel,perezd/bazel,hermione521/bazel,cushon/bazel,snnn/bazel,Krasnyanskiy/bazel,juhalindfors/bazel-patches,nkhuyu/bazel,hhclam/bazel,sicipio/bazel,hermione521/bazel,kidaa/bazel,sicipio/bazel,snnn/bazel,snnn/bazel,meteorcloudy/bazel,gavares/bazel,ruo91/bazel,Ansahmadiba/bazel,dropbox/bazel,zhexuany/bazel,mikelalcon/bazel,werkt/bazel,kamalmarhubi/bazel,variac/bazel,damienmg/bazel,mikelalcon/bazel,dslomov/bazel-windows,dropbox/bazel,twitter-forks/bazel,akira-baruah/bazel,UrbanCompass/bazel,mbrukman/bazel,abergmeier-dsfishlabs/bazel,joshua0pang/bazel,kamalmarhubi/bazel,d/bazel,rzagabe/bazel,katre/bazel,twitter-forks/bazel,mikelikespie/bazel,ulfjack/bazel,asarazan/bazel,joshua0pang/bazel,spxtr/bazel,dropbox/bazel,Ansahmadiba/bazel,Topher-the-Geek/bazel,hhclam/bazel,manashmndl/bazel,rzagabe/bazel,rohitsaboo/bazel,twitter-forks/bazel,variac/bazel,JackSullivan/bazel,cushon/bazel,d/bazel,twitter-forks/bazel,Asana/bazel,Topher-the-Geek/bazel,ulfjack/bazel,JackSullivan/bazel,Digas29/bazel,Topher-the-Geek/bazel,mrdomino/bazel,Topher-the-Geek/bazel,ulfjack/bazel,kidaa/bazel,kidaa/bazel,d/bazel,kchodorow/bazel,abergmeier-dsfishlabs/bazel,dhootha/bazel,murugamsm/bazel,Digas29/bazel,d/bazel,kamalmarhubi/bazel,dslomov/bazel-windows,LuminateWireless/bazel,hermione521/bazel,bitemyapp/bazel,rhuss/bazel,cushon/bazel,manashmndl/bazel,rhuss/bazel,damienmg/bazel,nkhuyu/bazel,xindaya/bazel,dslomov/bazel,wakashige/bazel,akira-baruah/bazel,dslomov/bazel-windows,gavares/bazel,mbrukman/bazel,charlieaustin/bazel,vt09/bazel,murugamsm/bazel,Ansahmadiba/bazel,dinowernli/bazel,rhuss/bazel,rhuss/bazel,murugamsm/bazel,rzagabe/bazel,sicipio/bazel,bazelbuild/bazel,juhalindfors/bazel-patches,dinowernli/bazel,UrbanCompass/bazel,d/bazel,werkt/bazel,asarazan/bazel,whuwxl/bazel,davidzchen/bazel,dslomov/bazel,hhclam/bazel,anupcshan/bazel,twitter-forks/bazel,whuwxl/bazel,ruo91/bazel,Digas29/bazel,ulfjack/bazel,mikelalcon/bazel,mrdomino/bazel,ButterflyNetwork/bazel,bitemyapp/bazel,kidaa/bazel,whuwxl/bazel,anupcshan/bazel,snnn/bazel,mbrukman/bazel,perezd/bazel,perezd/bazel,charlieaustin/bazel,mikelikespie/bazel,wakashige/bazel,spxtr/bazel,UrbanCompass/bazel,gavares/bazel,gavares/bazel,rohitsaboo/bazel,nkhuyu/bazel,d/bazel,LuminateWireless/bazel,UrbanCompass/bazel,kamalmarhubi/bazel,kchodorow/bazel-1,hermione521/bazel,variac/bazel,ruo91/bazel,whuwxl/bazel,twitter-forks/bazel,ulfjack/bazel,dslomov/bazel,LuminateWireless/bazel,spxtr/bazel,bazelbuild/bazel,iamthearm/bazel,Asana/bazel,meteorcloudy/bazel,zhexuany/bazel,anupcshan/bazel,d/bazel,sicipio/bazel,dslomov/bazel,murugamsm/bazel,rzagabe/bazel,mrdomino/bazel,dinowernli/bazel,anupcshan/bazel,dhootha/bazel,mikelalcon/bazel,damienmg/bazel,perezd/bazel,spxtr/bazel,wakashige/bazel,rzagabe/bazel,aehlig/bazel,vt09/bazel,juhalindfors/bazel-patches,anupcshan/bazel,xindaya/bazel,JackSullivan/bazel,Ansahmadiba/bazel,Ansahmadiba/bazel,kchodorow/bazel,kidaa/bazel,vt09/bazel,Asana/bazel,xindaya/bazel,akira-baruah/bazel,aehlig/bazel,anupcshan/bazel,abergmeier-dsfishlabs/bazel,dropbox/bazel,bitemyapp/bazel,meteorcloudy/bazel,manashmndl/bazel,whuwxl/bazel,Krasnyanskiy/bazel,rhuss/bazel,iamthearm/bazel,akira-baruah/bazel,variac/bazel,safarmer/bazel,twitter-forks/bazel,snnn/bazel,manashmndl/bazel,damienmg/bazel,Ansahmadiba/bazel,katre/bazel,Topher-the-Geek/bazel,joshua0pang/bazel,wakashige/bazel,rohitsaboo/bazel,ulfjack/bazel,damienmg/bazel,kamalmarhubi/bazel,kchodorow/bazel-1,charlieaustin/bazel,rhuss/bazel,davidzchen/bazel,dslomov/bazel,joshua0pang/bazel,abergmeier-dsfishlabs/bazel,spxtr/bazel,dslomov/bazel-windows,dslomov/bazel,mikelikespie/bazel,snnn/bazel,davidzchen/bazel,kchodorow/bazel,dslomov/bazel-windows,safarmer/bazel,Topher-the-Geek/bazel,dinowernli/bazel,aehlig/bazel,variac/bazel,spxtr/bazel,kchodorow/bazel-1,rzagabe/bazel,Topher-the-Geek/bazel,xindaya/bazel,ButterflyNetwork/bazel,bazelbuild/bazel,dropbox/bazel,mrdomino/bazel,sicipio/bazel,joshua0pang/bazel,Krasnyanskiy/bazel,kchodorow/bazel,rhuss/bazel,ulfjack/bazel,aehlig/bazel,wakashige/bazel,kchodorow/bazel-1,cushon/bazel,dslomov/bazel,hhclam/bazel,manashmndl/bazel,katre/bazel,meteorcloudy/bazel,variac/bazel,kchodorow/bazel-1,perezd/bazel,vt09/bazel,Krasnyanskiy/bazel,safarmer/bazel,abergmeier-dsfishlabs/bazel,meteorcloudy/bazel,charlieaustin/bazel,Asana/bazel,murugamsm/bazel,wakashige/bazel,zhexuany/bazel,JackSullivan/bazel,ButterflyNetwork/bazel,bitemyapp/bazel,JackSullivan/bazel,mrdomino/bazel,gavares/bazel,joshua0pang/bazel,hhclam/bazel,rohitsaboo/bazel,iamthearm/bazel,UrbanCompass/bazel,sicipio/bazel,cushon/bazel,akira-baruah/bazel,JackSullivan/bazel,JackSullivan/bazel,dinowernli/bazel,aehlig/bazel,davidzchen/bazel,xindaya/bazel,Asana/bazel,charlieaustin/bazel,katre/bazel,safarmer/bazel,werkt/bazel,bitemyapp/bazel,iamthearm/bazel,mrdomino/bazel,mikelalcon/bazel,rzagabe/bazel,juhalindfors/bazel-patches,hermione521/bazel,gavares/bazel,werkt/bazel,dhootha/bazel,werkt/bazel,vt09/bazel,nkhuyu/bazel,manashmndl/bazel,nkhuyu/bazel,murugamsm/bazel,safarmer/bazel,meteorcloudy/bazel,Krasnyanskiy/bazel,Krasnyanskiy/bazel,LuminateWireless/bazel,asarazan/bazel,damienmg/bazel,perezd/bazel,rohitsaboo/bazel,snnn/bazel,dinowernli/bazel,abergmeier-dsfishlabs/bazel,dhootha/bazel,mikelikespie/bazel,davidzchen/bazel,bazelbuild/bazel,dhootha/bazel,Topher-the-Geek/bazel,kidaa/bazel,Digas29/bazel,mbrukman/bazel,kchodorow/bazel,kchodorow/bazel-1,Asana/bazel,xindaya/bazel,joshua0pang/bazel,aehlig/bazel,nkhuyu/bazel,vt09/bazel,akira-baruah/bazel,dslomov/bazel-windows,kidaa/bazel,damienmg/bazel,iamthearm/bazel,ButterflyNetwork/bazel,hhclam/bazel,Asana/bazel,zhexuany/bazel,asarazan/bazel,LuminateWireless/bazel,safarmer/bazel,Krasnyanskiy/bazel,hermione521/bazel,ruo91/bazel,bitemyapp/bazel,kamalmarhubi/bazel,kchodorow/bazel,Krasnyanskiy/bazel,katre/bazel,cushon/bazel,iamthearm/bazel,gavares/bazel,mikelalcon/bazel