Reset mBufferInfos for setBufferInfo(s)

Since any of the setBufferInfo(s) can be converted
to BufferInfos in getBufferInfos, a reset is required
for mBufferInfos for every setBufferInfo(s)

Bug: 325512893
Test: atest android.mediav2.cts.CodecDecoderBlockModelMultiAccessUnitTest

Change-Id: Ibf28ad0983985bfb93f3bffe426677729430d06a

media/java/android/media/MediaCodec.java

@@ -4748,6 +4748,9 @@ final public class MediaCodec {
         }
 
         void setBufferInfo(MediaCodec.BufferInfo info) {
+            // since any of setBufferInfo(s) should translate to getBufferInfos,
+            // mBufferInfos needs to be reset for every setBufferInfo(s)
+            mBufferInfos.clear();
             mPresentationTimeUs = info.presentationTimeUs;
             mFlags = info.flags;
         }