public int getUtf8Size() {
    return bytes.size();
  }
Gets the size of this instance as UTF-8 code points. That is, get the number of bytes in the
UTF-8 encoding of this instance.

@return {@code >= 0;} the UTF-8 size
android/android_framework/dex-maker/src/main/java/com/android/dx/rop/cst/CstString.java