private void runWhenEnterAnimationComplete(Runnable runnable) {
        if (mEnterAnimationComplete) {
            runnable.run();
        } else {
            mOnEnterAnimationCompleteRunnable = runnable;
        }
    }
Sets the colors of status and navigation bar to match the ones seen after the splash screen
is transferred to the browser.
customtabs/src/android/support/customtabs/trusted/splashscreens/PwaWrapperSplashScreenStrategy.java