Merge "[snapshot] use caches for arraylists in mAppIds" into tm-dev am: 998d86ca

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18152915



Change-Id: Idf9d9de00cbdceedf28003899d7def2440bcedcd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>