code: public void setFullscreen(boolean fullscreen) {
          if (mBuilder.mScrimInsetsLayout != null) {
              mBuilder.mScrimInsetsLayout.setTintStatusBar(!fullscreen);
              mBuilder.mScrimInsetsLayout.setTintNavigationBar(!fullscreen);
          }
      }
docs: set the insetsFrameLayout to display the content in fullscreen
  under the statusBar and navigationBar
  
  @param fullscreen