Handle ID3 frames that end with empty text field

Issue: #2309

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=144061654

library/src/main/java/com/google/android/exoplayer2/metadata/id3/Id3Decoder.java

@@ -308,9 +308,14 @@ public final class Id3Decoder implements MetadataDecoder {
     int descriptionEndIndex = indexOfEos(data, 0, encoding);
     int descriptionEndIndex = indexOfEos(data, 0, encoding);
     String description = new String(data, 0, descriptionEndIndex, charset);
     String description = new String(data, 0, descriptionEndIndex, charset);
 
 
+    String value;
     int valueStartIndex = descriptionEndIndex + delimiterLength(encoding);
     int valueStartIndex = descriptionEndIndex + delimiterLength(encoding);
-    int valueEndIndex = indexOfEos(data, valueStartIndex, encoding);
-    String value = new String(data, valueStartIndex, valueEndIndex - valueStartIndex, charset);
+    if (valueStartIndex < data.length) {
+      int valueEndIndex = indexOfEos(data, valueStartIndex, encoding);
+      value = new String(data, valueStartIndex, valueEndIndex - valueStartIndex, charset);
+    } else {
+      value = "";
+    }
 
 
     return new TxxxFrame(description, value);
     return new TxxxFrame(description, value);
   }
   }
@@ -408,15 +413,25 @@ public final class Id3Decoder implements MetadataDecoder {
     int descriptionEndIndex = indexOfEos(data, 0, encoding);
     int descriptionEndIndex = indexOfEos(data, 0, encoding);
     String description = new String(data, 0, descriptionEndIndex, charset);
     String description = new String(data, 0, descriptionEndIndex, charset);
 
 
+    String text;
     int textStartIndex = descriptionEndIndex + delimiterLength(encoding);
     int textStartIndex = descriptionEndIndex + delimiterLength(encoding);
-    int textEndIndex = indexOfEos(data, textStartIndex, encoding);
-    String text = new String(data, textStartIndex, textEndIndex - textStartIndex, charset);
+    if (textStartIndex < data.length) {
+      int textEndIndex = indexOfEos(data, textStartIndex, encoding);
+      text = new String(data, textStartIndex, textEndIndex - textStartIndex, charset);
+    } else {
+      text = "";
+    }
 
 
     return new CommentFrame(language, description, text);
     return new CommentFrame(language, description, text);
   }
   }
 
 
   private static TextInformationFrame decodeTextInformationFrame(ParsableByteArray id3Data,
   private static TextInformationFrame decodeTextInformationFrame(ParsableByteArray id3Data,
       int frameSize, String id) throws UnsupportedEncodingException {
       int frameSize, String id) throws UnsupportedEncodingException {
+    if (frameSize <= 1) {
+      // Frame is empty or contains only the text encoding byte.
+      return new TextInformationFrame(id, "");
+    }
+
     int encoding = id3Data.readUnsignedByte();
     int encoding = id3Data.readUnsignedByte();
     String charset = getCharsetName(encoding);
     String charset = getCharsetName(encoding);