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

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

Change-Id: I11fbe1ba58de0622a2d23d990777d5fdc8d766b1