Merge "Set PendingIntent in RespondViaSmsManager as immutable" am: 1299625214 am: 44092bb626 am: efc224d91f am: b269920bfc

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

Change-Id: Ie25ad7a5bde70a1663bb5be75a885aa54edcce5f