Merge "Add README with details about the status of support for this app" into main am: 445cbc981b

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Music/+/3320613

Change-Id: I79b228b2189cf3c3db2a44d62dcb5b2bee5f68f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>