Merge "PackageManager Handler Thread Priorities adjustment." into tm-dev am: 4d14072e am: 3e6f83f4 am: 14539cad am: fca20a24

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17988785



Change-Id: I2679b5405da026ee7a40aa1e2bfd78104cc8a088
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>