Merge "[RESTRICT AUTOMERGE][pm] still allow debuggable for system app...

Merge "[RESTRICT AUTOMERGE][pm] still allow debuggable for system app downgrades" into tm-qpr-dev am: 76c55cf2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21266934



Change-Id: I867a1a75e332924f247a88eab4277d8986137a2a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>