Revert "Remove duplicate SCTE-35 format and add sample to TsExtractorTest"

This reverts commit 8591e69b.

library/core/src/main/java/com/google/android/exoplayer2/extractor/ts/SpliceInfoSectionReader.java

@@ -38,6 +38,8 @@ public final class SpliceInfoSectionReader implements SectionPayloadReader {
     this.timestampAdjuster = timestampAdjuster;
     idGenerator.generateNewId();
     output = extractorOutput.track(idGenerator.getTrackId(), C.TRACK_TYPE_METADATA);
+    output.format(Format.createSampleFormat(idGenerator.getFormatId(), MimeTypes.APPLICATION_SCTE35,
+        null, Format.NO_VALUE, null));
   }
 
   @Override