[automerger skipped] Merge "Use PendingIntent.FLAG_IMMUTABLE in PendingIntent in NotificationMgr" into qt-dev am: 59d0840be9 am: 3c71659983 -s ours

am skip reason: Change-Id Ib278926f4327b3fcbec25795b78643774911d1dc with SHA-1 9a41a17ea4 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/11256276

Change-Id: Ib961bef3b17ab0c339fb8efee09ad1892e12e886