public static byte[] decode(byte[] source) throws Base64DecoderException {
    return decode(source, 0, source.length);
  }
Decodes Base64 content in byte array format and returns
the decoded byte array.

@param source The Base64 encoded data
@return decoded data
@since 1.3
@throws Base64DecoderException
android/android_framework/base/src/main/java/com/google/android/vending/licensing/util/Base64.java