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