[automerger skipped] [DO NOT MERGE] Make PendingIntents in screenshots immutable am: cdd1d2a4fe am: 22945b7673 am: f511fd9335 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13950908

Change-Id: I21ef870cd47720dbd2ffb074002b63d3c017fafb