Returns a camera update that transforms the camera so that
the specified geographical bounding box is centered in the map
view at the greatest possible zoom level.
A non-zero padding insets the bounding box from the map view's edges.
The camera's new tilt and bearing will both be 0.0.
Returns a camera update that modifies the camera zoom level by the specified amount.
The optional focus is a screen point whose underlying geographical location
should be invariant, if possible, by the movement.