fixes #4314

This reverts commit 6bd552f6.

fixes #4313

This turned out to be a rather unnecessary optimization that might cause
problems with wake locks (the app is no longer awake after the 400ms timeout)

closes #4312

fixes #4211

thank you @singpolyma

fixes #4305

This makes 464XLAT networks (such as T-Mobile LTE) work.

https://bugs.chromium.org/p/webrtc/issues/detail?id=10707

closes #4071