Merge "Move system server pullers off background thread" into udc-qpr-dev am: 05cdc649

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24627997



Change-Id: If5bb84c6e522b747c5b0ee78f153be8b650a4141
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>