Removes FATAL() from MicrophoneVolumeIsAvailable() on Android

webrtc/modules/audio_device/android/audio_device_template.h

 /*
  *  Copyright (c) 2013 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 277 matching lines @@
     return output_.MinSpeakerVolume(minVolume);
   }
 
   int32_t SpeakerVolumeStepSize(uint16_t& stepSize) const override {
     FATAL() << "Should never be called";
     return -1;
   }
 
   int32_t MicrophoneVolumeIsAvailable(bool& available) override{
     available = false;
-    FATAL() << "Should never be called";
     return -1;
   }
 
   int32_t SetMicrophoneVolume(uint32_t volume) override {
     FATAL() << "Should never be called";
     return -1;
   }
 
   int32_t MicrophoneVolume(uint32_t& volume) const override {
     FATAL() << "Should never be called";
@@ skipping 246 matching lines @@
   OutputType output_;
 
   InputType input_;
 
   bool initialized_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_DEVICE_TEMPLATE_H_