Merge "Add shell command for setting the game mode for a package" into sc-dev...

Merge "Add shell command for setting the game mode for a package" into sc-dev am: 9bfb0f38 am: 4b26d257

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14521282

Change-Id: Ieb2c2b99953960102d921c61cb5eefe8b59c9cf5