Remove AudioOutputDeviceEnumerator. Replace usage with MediaDevicesManager.
Drive-by:
Stop using std::array literals to specify devices to enumerate. Use device types as indexes.
This makes it easier to understand what is being requested and removes reliance on the order of elements in the array.
BUG=
647660
Committed:
https://crrev.com/63931c20853b821d960649bb5ccd9b2f0332f245
Cr-Commit-Position: refs/heads/master@{#420959}