Add long timeout for widevine test
Add long timeout for widevine test

It's beyond our control how long it will take to install, so setting it to a high number 20s

Auditors: da39a3ee5e6b4b0d3255bfef95601890afd80709@aekeus

pmkary/braver,luixxiul/browser-laptop,diasdavid/browser-laptop,willy-b/browser-laptop,pmkary/braver,diasdavid/browser-laptop,timborden/browser-laptop,dcposch/browser-laptop,luixxiul/browser-laptop,timborden/browser-laptop,willy-b/browser-laptop,pmkary/braver,diasdavid/browser-laptop,darkdh/browser-laptop,darkdh/browser-laptop,diasdavid/browser-laptop,willy-b/browser-laptop,darkdh/browser-laptop,jonathansampson/browser-laptop,jonathansampson/browser-laptop,dcposch/browser-laptop,timborden/browser-laptop,timborden/browser-laptop,jonathansampson/browser-laptop,dcposch/browser-laptop,luixxiul/browser-laptop,willy-b/browser-laptop,darkdh/browser-laptop,pmkary/braver,jonathansampson/browser-laptop,luixxiul/browser-laptop,dcposch/browser-laptop