Bar: remove DateView

Change-Id: I3a4e82c298d29ed4a798932c6063cc1e6968bff4
MultiWindow: Allow to hide NavButtons + Recents icons

Change-Id: Ia9856bb0fa2a680d058412aa900bc7907718ce51
SystemUI: Hide new Nav Buttons conditionned on recents button visibility

Change-Id: I5e51fb42a771e6b9bbb4c779803fad876047d806
Actions: Add send key code actions

Change-Id: I4b3525cd64276c58bed9525758b9b1eb6cee8064
Actions: Collapse Notification Panel if already showing

Change-Id: I2b6f30569036686a66026ebd71e4c6790ef5b347