some more safety checks (#8275)

Author: markdevocht

android/src/main/java/com/reactnativenavigation/viewcontrollers/viewcontroller/LayoutDirectionApplier.kt

@@ -10,7 +10,10 @@ class LayoutDirectionApplier {
         val currentContext = root.view?.context ?: return
 
         if (options.layout.direction.hasValue()) {
-            root.activity.window.decorView.layoutDirection = options.layout.direction.get()
+            val direction = options.layout.direction.get()
+            root.activity?.window?.decorView?.let { decor ->
+                decor.layoutDirection = direction
+            }
             I18nUtil.instance.allowRTL(currentContext, options.layout.direction.isRtl)
             I18nUtil.instance.forceRTL(currentContext, options.layout.direction.isRtl)
         }

android/src/main/java/com/reactnativenavigation/viewcontrollers/viewcontroller/Presenter.java

@@ -137,6 +137,7 @@ private void applyNavigationBarVisibility(NavigationBarOptions options) {
     }
 
     private void setNavigationBarBackgroundColor(NavigationBarOptions navigationBar) {
+        if (activity == null) return;
         int defaultColor = SystemUiUtils.getDefaultNavBarColor();
         if (navigationBar.backgroundColor.canApplyValue()) {
             int color = navigationBar.backgroundColor.get(defaultColor);