Merge "Prevent system restart while updating package during boot" into udc-dev...

Merge "Prevent system restart while updating package during boot" into udc-dev am: f8e289c6 am: 65e6378f am: 1a05519d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22983796



Change-Id: I32c5cf16ca0fa0571d6d2a1977d6454dc19e9ca2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>