[android] #3071 - improve javadocs: removed reference to Google Maps
Consistent documentation style in constants package
[android] #3071 added documentation to MathConstants class
[android] #3071 added javadoc class documentation for MapboxConstants
[android] #3071 added documentation to the GeoConstants class, also added white line at end of the class for consistency
[android] #3071 make clear that public static final fields are used for MapChange, add link to MapView.OnMapChangeListener