How to increase inputType password dot size in android

I have an EditText whose inputType is numberPassword. I want to change the dot size which replaces the text. It is quite small(android default) for my purpose. I want to increase the dot size. How can I achieve that ?

Try to replace asterisk with this ascii codes.
⚫ - ⚫ - Medium Black Circle ⬤ - &#11044 - Black Large Circle

What would be the Unicode character for big bullet in the middle of the character?

 public class MyPasswordTransformationMethod extends PasswordTransformationMethod {
    @Override
    public CharSequence getTransformation(CharSequence source, View view) {
        return new PasswordCharSequence(source);
    }

    private class PasswordCharSequence implements CharSequence {
        private CharSequence mSource;
        public PasswordCharSequence(CharSequence source) {
            mSource = source; // Store char sequence
        }
        public char charAt(int index) {
            return '*'; // This is the important part
        }
        public int length() {
            return mSource.length(); // Return default
        }
        public CharSequence subSequence(int start, int end) {
            return mSource.subSequence(start, end); // Return default
        }
    }
}; 

text.setTransformationMethod(new MyPasswordTransformationMethod());