Merge "Add README with details about the status of support for this app" into main am: 4cbb74bbc0

Original change: https://android-review.googlesource.com/c/platform/packages/apps/BasicSmsReceiver/+/3319376

Change-Id: I7179dd64cd8935d0e78820cd1fd8137668d4e20e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>