aaudio: set primary flag for AAUDIO_PERFORMANCE_MODE_NONE

AudioStreamTrack set flag NONE for AAUDIO_PERFORMANCE_MODE_NONE,
but primary output may not be selected because of customization
for flag NONE , and flush issue occurs since wrong output is
selected for AAudio playback.

Set primary flag for AAUDIO_PERFORMANCE_MODE_NONE to make sure
primary output selected.

CRs-Fixed: 2225073
Change-Id: I662b36fc50b97438b6c6649073e4b7d83d79a485
Signed-off-by: Pranav Vashi <[email protected]>

Author: yidongh

media/libaaudio/src/legacy/AudioStreamTrack.cpp

@@ -88,6 +88,10 @@ aaudio_result_t AudioStreamTrack::open(const AudioStreamBuilder& builder)
             break;
 
         case AAUDIO_PERFORMANCE_MODE_NONE:
+            // Use primary output to avoid AAudio using direct output
+            flags = AUDIO_OUTPUT_FLAG_PRIMARY;
+            break;
+
         default:
             // No flags. Use a normal mixer in front of the FAST mixer.
             flags = AUDIO_OUTPUT_FLAG_NONE;