Hover master switch (1/2)

Remove hover icon from expanded status bar and with this add a check box in settings area for enable/disable.
This commit also open more space for notification reminder click area

Change-Id: I0d58a4d23a4e6e879cf3b8a305945e76d79e3505

Conflicts:
	packages/SystemUI/res/drawable-xxhdpi/ic_notify_hover_normal.png
	packages/SystemUI/res/drawable-xxhdpi/ic_notify_hover_pressed.png
	packages/SystemUI/res/layout/status_bar_expanded_header.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java