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: 0acff8fd am: 14e1049c

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

Change-Id: I508f8373db816ad4ec9a4ce4b97ac84583017eba