Adds audio session status to logs for each valid audio route change on iOS

webrtc/modules/audio_device/ios/audio_device_ios.mm

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 473 matching lines @@
 
   is_interrupted_ = false;
   RTCLog(@"Interruption ended. Updating audio unit state.");
   UpdateAudioUnit([RTCAudioSession sharedInstance].canPlayOrRecord);
 }
 
 void AudioDeviceIOS::HandleValidRouteChange() {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
 
   RTCAudioSession* session = [RTCAudioSession sharedInstance];
+  RTCLog(@"%@", session);
   HandleSampleRateChange(session.sampleRate);
 }
 
 void AudioDeviceIOS::HandleCanPlayOrRecordChange(bool can_play_or_record) {
   RTCLog(@"Handling CanPlayOrRecord change to: %d", can_play_or_record);
   UpdateAudioUnit(can_play_or_record);
 }
 
 void AudioDeviceIOS::HandleSampleRateChange(float sample_rate) {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
@@ skipping 328 matching lines @@
 
   // All I/O should be stopped or paused prior to deactivating the audio
   // session, hence we deactivate as last action.
   [session lockForConfiguration];
   UnconfigureAudioSession();
   [session endWebRTCSession:nil];
   [session unlockForConfiguration];
 }
 
 }  // namespace webrtc