Merge "Enable background resource cache trim when device goes idle" into udc-dev am: 932879c9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23451202



Change-Id: If8b738649272f15e3662949078e7cfa2f8a10b4d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>