Merge "[pm] forbid deletion of protected packages" into tm-dev am: 12e837e3 am: afb5d201

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19929347



Change-Id: I4de257e1c35fba8ac85e4605540033b80e70f2ae
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>