StagefrightRecoder: Disabling B-frame support

Disabling b-frame support from stagefright recorder in case of
audio source as mic and video source is surface use case only
because screen recorder with microphone doesn't play in sync
if b-frame is enabled.
If the audio source selected is INTERNAL (i.e. device) or
MIC_AND_INTERNAL with screen recorder then b frame is supported.

Bug: 288549440
Test: manually check screen recording with audio from mic has audio/video in synch
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:af685c66bab17b71fe1624f76b5d55628f79e6fa)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:da3407f7688f35eb2dce79f1405feeb182241a3c)
Merged-In: I4098655eb9687fb633085333bc140634441566e6
Change-Id: I4098655eb9687fb633085333bc140634441566e6

media/libmediaplayerservice/StagefrightRecorder.cpp

diff --git a/media/libmediaplayerservice/StagefrightRecorder.cpp b/media/libmediaplayerservice/StagefrightRecorder.cpp
index 0365085..e0449ff 100644
--- a/media/libmediaplayerservice/StagefrightRecorder.cpp
+++ b/media/libmediaplayerservice/StagefrightRecorder.cpp
@@ -2099,6 +2099,11 @@
 
     if (tsLayers > 1) {
         uint32_t bLayers = std::min(2u, tsLayers - 1); // use up-to 2 B-layers
+        // TODO(b/341121900): Remove this once B frames are handled correctly in screen recorder
+        // use case in case of mic only
+        if (mAudioSource == AUDIO_SOURCE_MIC && mVideoSource == VIDEO_SOURCE_SURFACE) {
+            bLayers = 0;
+        }
         uint32_t pLayers = tsLayers - bLayers;
         format->setString(
                 "ts-schema", AStringPrintf("android.generic.%u+%u", pLayers, bLayers));