[automerger skipped] Merge "Add FLAG_IMMUTABLE to PendingIntent in LegacyModeSmsHandler." into pi-dev am: 44b02956c4 am: 06572a0820 am: 5625595e77 am: 0642423c12 am: a6351932b9 am: 7495bd62c7 am: adf351e352 am: bb04e8721e am: 0c31614d90 -s ours

am skip reason: Merged-In I1024353434674f8e4bf164c3a6c1e16924dfaa8f with SHA-1 54dc4e8742 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Dialer/+/16199731

Change-Id: I9cc34de644a550d4d401bfff01bc4ce0a443ebfc