[automerger skipped] Merge "[DO NOT MERGE] Make GlobalScreenshot PendingIntents immutable" into pi-dev am: be1f0f2863 -s ours am: 8b691cfcea am: 547f99bbda -s ours am: f9052f7905 am: d43cdd3ec7 am: 77511ae571

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12773074

Change-Id: I02178532baedeb74b96fed17a4a2b7a03ee7b12c