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This CL converts implementations of media_device.mojom and related classes.
Major changes are as below,

 - Change MediaDevicesListenerPtr with PendingRemote or Remote
 - Change BindingSet with ReceiverSet
 - Change Binding with Receiver

Bug: 955171
Change-Id: I7b441d04659ace82ba10ab8b51e0d8039c467670
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1760835Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Kinuko Yasuda <kinuko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690273}