private boolean providerSupportsColorSchemeParams(Context context, String providerPackage) {
        return getSupportedFeatures(context, providerPackage).colorSchemeCustomization;
    }
Makes a best-effort guess about which navigation bar color will be used when the Trusted Web
Activity is launched. Returns null if not possible to predict.
customtabs/src/android/support/customtabs/trusted/splashscreens/SystemBarColorPredictor.java