Merge "[RESTRICT AUTOMERGE][pm] prevent system app downgrades of versions...

Merge "[RESTRICT AUTOMERGE][pm] prevent system app downgrades of versions lower than preload" into tm-qpr-dev am: b4226a79

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21159680



Change-Id: I15d88c04fc199676efb9c0469fcac594ca0fea29
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>