Merge pull request #5144 from google:dev-v2-vttfix

PiperOrigin-RevId: 222798467

library/core/src/main/java/com/google/android/exoplayer2/text/webvtt/WebvttDecoder.java

@@ -110,7 +110,7 @@ public final class WebvttDecoder extends SimpleSubtitleDecoder {
         foundEvent = EVENT_END_OF_FILE;
         foundEvent = EVENT_END_OF_FILE;
       } else if (STYLE_START.equals(line)) {
       } else if (STYLE_START.equals(line)) {
         foundEvent = EVENT_STYLE_BLOCK;
         foundEvent = EVENT_STYLE_BLOCK;
-      } else if (COMMENT_START.startsWith(line)) {
+      } else if (line.startsWith(COMMENT_START)) {
         foundEvent = EVENT_COMMENT;
         foundEvent = EVENT_COMMENT;
       } else {
       } else {
         foundEvent = EVENT_CUE;
         foundEvent = EVENT_CUE;