QuickSettings : Dismiss notification panel upon toggle

Automatically dismisses the notification panel after selecting a toggle,
if the option is enabled.

Patchset 2 : Rename to "panel"
             Rename onclick/onlongclick to mOnClick/mOnLongClick

Change-Id: Iaf211db99e45ef464cbc59aa2ee26899f1e44d22

Conflicts:
	core/java/android/provider/Settings.java