HOVER: Match notification width on tablets too

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Conflicts:
	packages/SystemUI/res/values/cr_dimens.xml
HOVER: Ensure to clear after reparenting all notifications

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
HOVER: Fix notification content not being updated