Document units for MyLocationViewSettings.setPadding()

[zugaldia]

Currently, the documentation for MyLocationViewSettings.setPadding(int left, int top, int right, int bottom) says the following:

Set the MyLocationView padding.
Parameters:
left - the padding left of MyLocationView
top - the padding top of MyLocationView
right - the padding right of MyLocationView
bottom - the padding bottom of MyLocaionView

(also, note the typo in that last MyLocaionView).

The documentation doesn't say the units for these parameters, let's add it. This is confusing, for example, because if we set a padding like:

map.getMyLocationViewSettings().setPadding(0, mapView.getHeight() / 2, 0, 0);

We'd expect the MyLocationView object to be at the bottom of the screen. However, the result is slightly different:

/cc: @tobrun @cammace

[tobrun]

we divide the padding immediately by 2 when setting, this is needed for correctly calculating the center point for tilt offset later on but is now also taking into account when caculating location on screen. Workaround for now is doubling the value.

[tobrun]

MyLocationView is going to be replaced with LocationLayer.