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

Fixes: 311374917
Test: atest android.content.pm.cts.PackageManagerTest
(cherry picked from commit 3ee5dfdcba047051ce81dca0696d6ddfeafe2d98)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e336c7d7c9ceb49d934bbef0d27ecef344ad80ed)
Merged-In: I5b5b81cf43b06837a22c8dfd170a112106dd64c1
Change-Id: I5b5b81cf43b06837a22c8dfd170a112106dd64c1
1 file changed