[automerger skipped] Merge "Use FLAG_IMMUTABLE for CarrierKeyDownloadManager"...

[automerger skipped] Merge "Use FLAG_IMMUTABLE for CarrierKeyDownloadManager" into pi-dev am: fdf9e4b4 am: 6757aa3b am: 8f9dab03 -s ours am: da33bb4c -s ours am: 7145504f -s ours

am skip reason: Change-Id I223047644021a647bce72f229998487bee0c007b with SHA-1 02c8f22e is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/11480991

Change-Id: I1aa9c7ef2746c6172b6083740d7d7e473b89ba71