StatusBarView: Avoid unnecessary calls to mHandler.post()

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Signed-off-by: David L.-W. <xD_e-mail@gmx.de>
ExpandHelper: Improve one finger expanding forced handling

Instead of force returning false if view is null, setup a boolean
to force it with custom views like hover. Cherry-picked from CM.

Also request disallow intercept on drag started.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
HOVER: Ensure to clear after reparenting all notifications

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Change-Id: I8d3735836952394942f044ebd067d7cc7a82bc2e
HOVER: Fix notification content not being updated

Change-Id: I6f5e95cfff9b78cdabd1d9aa00e0577b0ab78508