[automerger skipped] Forward fix for: Set FLAG_IMMUTABLE flag on...

[automerger skipped] Forward fix for: Set FLAG_IMMUTABLE flag on FirstScreenBroadcast PendingIntent. am: 89299047 am: 4401663f am: 209035af -s ours am: d1163873 -s ours am: 89e9723f -s ours am: 20a58216 -s ours

am skip reason: Merged-In I70acd4ce48853be728be1fb80b4b885d00a059a9 with SHA-1 5af0edef is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14936503

Change-Id: Id96cbb627cca6ee7254887f68607e607d97c6c6a