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 am: b0590930

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

Change-Id: I5f13b109f54a1ee4e2e6d0edfae09adfb4c76f59