Merge "Revert "Prevent non-admin users from deleting system apps."" into rvc-dev am: fefefdc7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19336830



Change-Id: I38ba3d758ec70e7015656d67558aa845292fe085
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>