[automerger skipped] RingtoneManager: verify default ringtone is audio am: 30c9b4ef -s ours

am skip reason: Merged-In I3f2c487ded405c0c1a83ef0a2fe99cff7cc9328e with SHA-1 0a4792b6 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21027121



Change-Id: Iad3930a3c6483c9e5937998f66bf6c7d1d0e3b0f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>