[CrOS Bluetooth] Support audio devices not containing rendering bit.

Update DeviceConversionUtil to set BluetoothDeviceProperties'
audio_capability property to kCapableOfAudioOutput if the
BluetoothDevice doesn't have the correct Bluetooth class bits set, but
does have an audio service UUID in its list of UUIDs.

Fixed: b/209666215
Change-Id: I261b2edbba1adc50c1ca5c27137a603ed07a3dc0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3408354


Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Gordon Seto <gordonseto@google.com>
Cr-Commit-Position: refs/heads/main@{#962179}