Add fontFamily to avoid diferences between editText with inputType=TextPassword and other inputType values.

From the doc: "By default, when you set an EditText element to use the "textPassword" input type, the font family is set to monospace, so you should change its font family to "sans-serif" so that both text fields use a matching font style".
Source: https://developer.android.com/guide/topics/ui/dialogs.html