Make devicelab tests use 'app' template (#22694)
Make devicelab tests use 'app' template (#22694)

Fixes the build after my module rename broke the Windows tests.
tvolkert/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,cbracken/flutter,cbracken/flutter,Hixie/flutter,Hixie/flutter,flutter/flutter,cbracken/flutter,cbracken/flutter,tvolkert/flutter,Hixie/flutter,Hixie/flutter,Hixie/flutter,flutter/flutter,flutter/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,cbracken/flutter,cbracken/flutter,cbracken/flutter,cbracken/flutter,flutter/flutter,flutter/flutter,tvolkert/flutter,tvolkert/flutter,tvolkert/flutter