Improves stereo/mono audio support on Android

webrtc/modules/audio_device/android/audio_manager.cc

Index: webrtc/modules/audio_device/android/audio_manager.cc
diff --git a/webrtc/modules/audio_device/android/audio_manager.cc b/webrtc/modules/audio_device/android/audio_manager.cc
index da348d2117202bca10ee08cab2f8375aa73e9dc1..60a1d9a9a52defd1e541bd419cc9fe1f0061dee9 100644
--- a/webrtc/modules/audio_device/android/audio_manager.cc
+++ b/webrtc/modules/audio_device/android/audio_manager.cc
@@ -220,6 +220,18 @@ bool AudioManager::IsProAudioSupported() const {
   return pro_audio_;
 }
 
+bool AudioManager::IsStereoPlayoutSupported() const {
+  RTC_DCHECK(thread_checker_.CalledOnValidThread());
+  ALOGD("IsStereoPlayoutSupported()");
+  return (playout_parameters_.channels() == 2);
+}
+
+bool AudioManager::IsStereoRecordSupported() const {
+  RTC_DCHECK(thread_checker_.CalledOnValidThread());
+  ALOGD("IsStereoRecordSupported()");
+  return (record_parameters_.channels() == 2);
+}
+
 int AudioManager::GetDelayEstimateInMilliseconds() const {
   return delay_estimate_in_milliseconds_;
 }