StageFright: Set input surface default format

The default pixel format used in 'GraphicBufferSource'
may cause issues for some producers like camera. The
default currently is RGB based and works with producers
like camera largely by relying on WARs like b/9487482.
This could be problematic in case the SW usage bits get
enabled.

Bug: 116696800
Bug: 115338759
Test: runtest -x
cts/tests/camera/src/android/hardware/camera2/cts/RecordingTest.java -m
testRecordingFromPersistentSurface
runtest -x cts/tests/tests/media/src/android/media/cts/VideoEncoderTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/NativeEncoderTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/EncodeVirtualDisplayTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/ExtractDecodeEditEncodeMuxTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/EncodeVirtualDisplayWithCompositionTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/MediaSyncTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/EncodeDecodeTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/DecodeEditEncodeTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/MediaCodecTest.java
runtest -x cts/tests/tests/media/src/android/media/cts/MediaRecorderTest.java
screenrecord --size=1024x720 --time-limit 5 /sdcard/record.mp4

Change-Id: I65512bd68a801b0667a0df5d670d8ec9339d2ae4