Add favicon to javadocs. b/145393567

PiperOrigin-RevId: 289054937

RELEASENOTES.md

@@ -36,6 +36,7 @@
   This issue caused FLAC streams with other bit depths to sound like white noise
   This issue caused FLAC streams with other bit depths to sound like white noise
   on earlier releases, but only when embedded in a non-FLAC container such as
   on earlier releases, but only when embedded in a non-FLAC container such as
   Matroska or MP4.
   Matroska or MP4.
+* Javadocs: Add favicon for easier identification in browser tabs
 
 
 ### 2.11.1 (2019-12-20) ###
 ### 2.11.1 (2019-12-20) ###