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.

Change-Id: If7bad5c3faa02d39d35d8ad94e5995c823202d4c

Conflicts:

	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java