Context: Firebase Testlab has physical devices, only some of which are highly available. If we run tests too frequently on a non-highly available device, it will time out. This is not an issue for virtual devices.

#130497 appears to be the result of running a test on a busy day on a device that probably isn't highly available right now.

It would be great if we could tell cocoon to run this test in batches of say 30 commits, so that it runs more or less once a day on a busy day (it's ok if it doesn't run at all on some days). Today the yaml file says that all targets are run on every commit.

@godofredoc @CaseyHillers for input

@reidbaker @gmackall @zanderso @jonahwilliams fyi