This is step to allow migration of Test ADM to the AudioDeviceModuleImpl as a base class to include AudioDeviceBuffer into SUT. Also it will allow to remove WaitForRecordingEnd() method from Test ADM Bug: b/272350185, webrtc:15081 Change-Id: If2aa43ec0c31f6ad9aab8aa3e36cabc4a7a73c22 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/300862 Commit-Queue: Artem Titov <titovartem@webrtc.org> Reviewed-by: Henrik Andreassson <henrika@webrtc.org> Cr-Commit-Position: refs/heads/main@{#39849}