Merge "Set PendingIntent in RespondViaSmsManager as immutable" am: 1299625214 am: 44092bb626 am: efc224d91f

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telecomm/+/1656492

Change-Id: I573f3baf0dd7bc2b8ad0d10527fcd1d6884afa7b