Framework: Always show settings button option for notification drawer (1/2)

This also fixes a bug where the settings button was not showing the proper pressed drawable
and fixes the transparency on the ic_notify_settings_normal drawable to match the rest of the
notification drawer assets.

Also removes longpress PW toggle setting since it now defaults to this.

Change-Id: I1b7624fd3278504a07c79daab00babcb5f7b37d1