[automerger skipped] Merge "Disallow system apps to be installed/updated as...

[automerger skipped] Merge "Disallow system apps to be installed/updated as instant." into rvc-dev am: 35b1a471 am: 0109c597 -s ours

am skip reason: Merged-In Idd89a6dd72f0e68259095f677185f0494391025c with SHA-1 0d0f185c is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/25716297



Change-Id: Idef88ed48b0275f2f0cd9e8148707d0e5a101cca
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>