Revert "Increate karma browser activity timeout to 5min (#26887)" (#26955)
Revert "Increate karma browser activity timeout to 5min (#26887)" (#26955)

This reverts commit ae7b203c45199d7a80dda63f2b326231c8ccc6d7.
smartadserver/amphtml,adup-tech/amphtml,mhc-gh/amphtml,zhouyx/amphtml,Gregable/amphtml,taboola/amphtml,alanorozco/amphtml,jpettitt/amphtml,honeybadgerdontcare/amphtml,voyagegroup/amphtml,danielrozenberg/amphtml,jpettitt/amphtml,cory-work/amphtml,prateekbh/amphtml,jmadler/amphtml,jridgewell/amphtml,ampproject/amphtml,jpettitt/amphtml,danielrozenberg/amphtml,voyagegroup/amphtml,ampproject/amphtml,mhc-gh/amphtml,sharethrough/amphtml,cory-work/amphtml,media-net/amphtml,prateekbh/amphtml,jpettitt/amphtml,alanorozco/amphtml,ampproject/amphtml,taboola/amphtml,media-net/amphtml,danielrozenberg/amphtml,mhc-gh/amphtml,smartadserver/amphtml,Gregable/amphtml,jpettitt/amphtml,alanorozco/amphtml,yandex-pcode/amphtml,voyagegroup/amphtml,nexxtv/amphtml,sharethrough/amphtml,adup-tech/amphtml,alanorozco/amphtml,cory-work/amphtml,jridgewell/amphtml,sharethrough/amphtml,rsimha-amp/amphtml,jmadler/amphtml,zhouyx/amphtml,rsimha-amp/amphtml,nexxtv/amphtml,media-net/amphtml,rsimha-amp/amphtml,sharethrough/amphtml,nexxtv/amphtml,alanorozco/amphtml,rsimha-amp/amphtml,zhouyx/amphtml,taboola/amphtml,lannka/amphtml,nexxtv/amphtml,voyagegroup/amphtml,jridgewell/amphtml,yandex-pcode/amphtml,Gregable/amphtml,yandex-pcode/amphtml,danielrozenberg/amphtml,jpettitt/amphtml,nexxtv/amphtml,nexxtv/amphtml,mhc-gh/amphtml,media-net/amphtml,adup-tech/amphtml,ampproject/amphtml,rsimha-amp/amphtml,adup-tech/amphtml,jmadler/amphtml,lannka/amphtml,prateekbh/amphtml,cory-work/amphtml,voyagegroup/amphtml,alanorozco/amphtml,rsimha-amp/amphtml,danielrozenberg/amphtml,prateekbh/amphtml,lannka/amphtml,yandex-pcode/amphtml,zhouyx/amphtml,voyagegroup/amphtml,jridgewell/amphtml,Gregable/amphtml,taboola/amphtml,cory-work/amphtml,yandex-pcode/amphtml,yandex-pcode/amphtml,honeybadgerdontcare/amphtml,jridgewell/amphtml,danielrozenberg/amphtml,rsimha-amp/amphtml,honeybadgerdontcare/amphtml,jridgewell/amphtml,zhouyx/amphtml,Gregable/amphtml,honeybadgerdontcare/amphtml,taboola/amphtml,ampproject/amphtml,Gregable/amphtml,yandex-pcode/amphtml,prateekbh/amphtml,prateekbh/amphtml,taboola/amphtml,honeybadgerdontcare/amphtml,alanorozco/amphtml,lannka/amphtml,Gregable/amphtml,mhc-gh/amphtml,cory-work/amphtml,lannka/amphtml,taboola/amphtml,lannka/amphtml,media-net/amphtml,jpettitt/amphtml,danielrozenberg/amphtml,media-net/amphtml,voyagegroup/amphtml,nexxtv/amphtml,mhc-gh/amphtml,jmadler/amphtml,cory-work/amphtml,sharethrough/amphtml,zhouyx/amphtml,prateekbh/amphtml,smartadserver/amphtml,ampproject/amphtml,mhc-gh/amphtml,ampproject/amphtml,lannka/amphtml,jpettitt/amphtml,media-net/amphtml,sharethrough/amphtml,danielrozenberg/amphtml,honeybadgerdontcare/amphtml,Gregable/amphtml,adup-tech/amphtml,jridgewell/amphtml,adup-tech/amphtml,mhc-gh/amphtml,media-net/amphtml,honeybadgerdontcare/amphtml,alanorozco/amphtml,smartadserver/amphtml,jmadler/amphtml,zhouyx/amphtml,smartadserver/amphtml,ampproject/amphtml,jmadler/amphtml,smartadserver/amphtml