Add ability to use float densities.

    // TODO: Not sure if display density should handled by SF any longer

    class Density {

        static int getDensityFromProperty(char const* propName) {

        static float getDensityFromProperty(char const* propName) {

            char property[PROPERTY_VALUE_MAX];

            int density = 0;

            float density = 0.0f;

            if (property_get(propName, property, nullptr) > 0) {

                density = atoi(property);

                density = strtof(property, nullptr);

            }

            return density;

        }

    public:

        static int getEmuDensity() {

        static float getEmuDensity() {

            return getDensityFromProperty("qemu.sf.lcd_density"); }

        static int getBuildDensity()  {

        static float getBuildDensity()  {

            return getDensityFromProperty("ro.sf.lcd_density"); }

    };