Merge "Add smart idle maintenance service" am: 0134ac7710 am: e8d9b1d709 am: 926fe1c432

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1936378

Change-Id: I6d6c5109ade1dc05ba16fef56f6e6a62a7dd13ae