Update MediaFormat.java

declare WEBMA_OPUS

Author: kapodamy

extractor/src/main/java/org/schabi/newpipe/extractor/MediaFormat.java

@@ -38,6 +38,7 @@ public enum MediaFormat {
     MP3         (0x300,   "MP3",   "mp3",  "audio/mpeg"),
     OPUS        (0x400,   "opus",  "opus", "audio/opus"),
     OGG         (0x500, "ogg", "ogg", "audio/ogg"),
+    WEBMA_OPUS  (0x200,   "WebM Opus",  "webm", "audio/webm"),
     // subtitles formats
     VTT         (0x1000,   "WebVTT",                      "vtt",   "text/vtt"),
     TTML        (0x2000,   "Timed Text Markup Language",  "ttml",  "application/ttml+xml"),