Notification dialog missing close behavior on Android

[prud]

Native notification dialogs (alert and confirm) are missing some default closing behaviors. There are usually 3 ways to close them on Android:

1. Press the button --> works
2. Press on the dimmer/background --> nothing happens
3. Press the back button --> nothing happens

Any chance to implement 2 and 3 for Android? For iOS the current behavior is alright imho.