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This CL adds to AudioManagerWin implementations of the following
methods:
* GetDefaultInputDeviceID
* GetCommunicationsInputDeviceID
* GetCommunicationsOutputDeviceID

Bug: 780492
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I22c71f79695de8930ccb0d9c3d7ed2ba56ebdf23
Reviewed-on: https://chromium-review.googlesource.com/811184Reviewed-by: Olga Sharonova <olka@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523731}