Add README with details about the status of support for this app am: 6e2da97ea9 am: 4d202bcec4 Original change: https://android-review.googlesource.com/c/platform/packages/apps/Car/Notification/+/3320578 Change-Id: I051ed731c0e84f84301941d5a0a5b1c5f5b41dad Signed-off-by: Automerger Merge Worker <[email protected]>