[automerger skipped] Merge "[DO NOT MERGE] Make GlobalScreenshot PendingIntents immutable" into oc-dev am: d15b2f5bce am: 0d82d9ffc9 am: a4fbde5687 -s ours am: b1b2354740 -s ours am: 29802fb39f am: 378d3ae57d -s ours

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Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12773217

Change-Id: Ib64d353455f4a70a88b5fa90cec66cc021d6ea8a