fix(cea): make a more robust CEA MP4 parser (#3965)

Fix a HLS error reported in #2337 (comment)

Tested with https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_adv_example_hevc/master.m3u8

lib/cea/mp4_cea_parser.js

@@ -236,7 +236,13 @@ shaka.cea.Mp4CeaParser = class {
           });
         }
       } else {
-        reader.skip(naluSize - 1);
+        try {
+          reader.skip(naluSize - 1);
+        } catch (e) {
+          // It is necessary to ignore this error because it can break the start
+          // of playback even if the user does not want to see the subtitles.
+          break;
+        }
       }
       sampleSize -= (naluSize + 4);
       if (sampleSize == 0) {