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: 2a1c02e3 am: 567f6085

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



Change-Id: I43b5795caa0eb4ac225dfb36e3e6281f76311db0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>