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

[automerger skipped] Merge "Disallow system apps to be installed/updated as instant." into sc-v2-dev am: 7750c263 -s ours am: edaa1d91 -s ours am: 2c0957a8 -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/+/25718734



Change-Id: I961271242e3796c65ca037b909a5cdaf7802b93d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>