Stop marking apps as privileged if they are not signed properly. am: e336c7d7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/25842163



Change-Id: Ib601463504a9cf9c123b40d82a7511a6c833cdee
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>