[automerger skipped] Merge "Unexport all PackageInstaller receivers" into sc-qpr1-dev am: d991ba31e3 am: be42a71d28 am: ab099eccfd -s ours

am skip reason: Merged-In I782fc21c848831a2a4aeab736cd47ad45781b290 with SHA-1 0806568d41 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15522458

Change-Id: Ia74edf903d061039159a9b4ce041400b87fe1a7c