Change order of RawCcExtractor init to call format before endTracks.

This fixes an issue where the output track's sample format is null for rawCC captions when endTracks method is called.

PiperOrigin-RevId: 313622631

library/extractor/src/main/java/com/google/android/exoplayer2/extractor/rawcc/RawCcExtractor.java

@@ -66,8 +66,8 @@ public final class RawCcExtractor implements Extractor {
   public void init(ExtractorOutput output) {
     output.seekMap(new SeekMap.Unseekable(C.TIME_UNSET));
     trackOutput = output.track(0, C.TRACK_TYPE_TEXT);
-    output.endTracks();
     trackOutput.format(format);
+    output.endTracks();
   }
 
   @Override