[automerger skipped] Only trigger a metadata sync if we don't have any cover...

[automerger skipped] Only trigger a metadata sync if we don't have any cover artwork am: d18edd5b am: 6f6584c2 -s ours

am skip reason: Change-Id I3eee51b2b5fe6d7d99cfe3e4b821327303be1e26 with SHA-1 1deb5987 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Bluetooth/+/11922314

Change-Id: Ie66b9e61eeddc30057e9caeefae121e1f78ec958