Reduce FG prefer_idle when display is idle am: ca70b74ed8

Original change: https://googleplex-android-review.googlesource.com/c/device/google/raviole/+/17114005

Change-Id: Id513e39a5a92efa28287e5a7cb2022e75a1f34df
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>