Merge "Check app idle states and inform listeners on power-save-wl change."...

Merge "Check app idle states and inform listeners on power-save-wl change." into rvc-dev am: 91294181 am: aec7b4aa am: a7c84194

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12166806

Change-Id: I45ce49c208207fa3aa3e49f75424e91f3a00d5ce