Merge "Make mutable implicit PendingIntent explicit for security reasons" am: 9b2df0e11f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2346082

Change-Id: Ia79751d20158f231e0b79fe8e4b4f3c93f98a7ec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>