Passwords should be invisible to the accessibility services

[mohammadnaseri]

Due to recent attacks, malicious apps that are using the accessibility service can capture all user inputs. In this case, the passwords should be ignored for the accessibility service, so such attacks cannot happen. This is done by our research project in CISPA, Saarland University, Germany.

[RyuzakiKK]

Thanks for your PR.
Even if making more complicated the input for people that legitimately need an accessibility service is not ideal, until a better solution is found, this seems to be good enough for me.