update News for 3.0.2

(cherry picked from commit b3e2c873)

NEWS

@@ -2,7 +2,9 @@ Version 3.0.2:
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 - Automatic reconnections to HTTP(S) servers on unexpected drops on iOS and tvOS
 - Fixed deadlock when sent to background
-- Fixed some OpenGL crashes
+- Fixed some OpenGL and flv crashes
+- Fixed HEVC playback that resulted in just a black screen
+- Removal of private API usage by ffmpeg
 
 Version 3.0.0:
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