It turned out to be straight forward if you look into the right place in documentation.
There is a UiSettings class inside a GoogleMap that allows enabling and disabling of gestures.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.maps_fragment);
GoogleMap map = mapFragment.getMap();
map.getUiSettings().setRotateGesturesEnabled(false);