Add a release note for MPEG-TS H.265 SPS parsing fix

Also clean-up a comment about skipping the NAL start code

RELEASENOTES.md

@@ -39,6 +39,10 @@
     *   Add `Builder` for `DeviceInfo` and deprecate existing constructor.
     *   Add `DeviceInfo.routingControllerId` to specify the routing controller
         ID for remote playbacks.
+*   Extractors:
+    *   Fix parsing of H.265 SPS in MPEG-TS files by re-using the parsing logic
+        already used by RTSP and MP4 extractors
+        ([#303](https://github.com/androidx/media/issues/303)).
 *   Session:
     *   Deprecate 4 volume-controlling methods in `Player` and add overloaded
         methods which allow users to specify volume flags:

libraries/extractor/src/main/java/androidx/media3/extractor/ts/H265Reader.java

@@ -243,8 +243,9 @@ public final class H265Reader implements ElementaryStreamReader {
     System.arraycopy(sps.nalData, 0, csdData, vps.nalLength, sps.nalLength);
     System.arraycopy(pps.nalData, 0, csdData, vps.nalLength + sps.nalLength, pps.nalLength);
 
+    // Skip the 3-byte NAL unit start code synthesised by the NalUnitTargetBuffer constructor.
     NalUnitUtil.H265SpsData spsData =
-        NalUnitUtil.parseH265SpsNalUnit(sps.nalData, 3, sps.nalLength); // 3bytes start code
+        NalUnitUtil.parseH265SpsNalUnit(sps.nalData, /* nalOffset= */ 3, sps.nalLength);
 
     String codecs =
         CodecSpecificDataUtil.buildHevcCodecString(