Merge "Tie game session lifetime to game process lifetime." into tm-dev am:...

Merge "Tie game session lifetime to game process lifetime." into tm-dev am: 4359c9d3 am: abc05161

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16979564

Change-Id: I85285752727170568b64ee0a70f58bfa95bca43a