[automerger skipped] Merge "[DO NOT MERGE] Make GlobalScreenshot PendingIntents immutable" into qt-dev am: b968a16db7 am: 2a84aae3ce -s ours am: 4e7a7d3cd3 am: a26090c1ae am: 994c010256

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12773073

Change-Id: If7c2e61b5a3f5df6b4c8c81dee9bbf0c8d1fe799