fix-next(modal) fix crash when closing modal dialog with root tabview inside (#5446)

tns-core-modules/ui/core/view/view.android.ts

@@ -175,15 +175,7 @@ function initializeDialogFragment() {
 
             this._shownCallback();
         }
-
-        public onStop(): void {
-            super.onStop();
-            const owner = this.owner;
-            if (owner.isLoaded) {
-                owner.callUnloaded();
-            }
-        }
-
+        
         public onDismiss(dialog: android.content.IDialogInterface): void {
             super.onDismiss(dialog);
             const manager = this.getFragmentManager();
@@ -191,6 +183,11 @@ function initializeDialogFragment() {
                 removeModal(this.owner._domId);
                 this._dismissCallback();
             }
+
+            const owner = this.owner;
+            if (owner.isLoaded) {
+                owner.callUnloaded();
+            }
         }
 
         public onDestroy(): void {

tns-core-modules/ui/tab-view/tab-view.android.ts

@@ -461,6 +461,10 @@ export class TabView extends TabViewBase {
     }
 
     private shouldUpdateAdapter(items: Array<TabViewItemDefinition>) {
+        if (!this._pagerAdapter) {
+            return false;
+        }
+        
         const currentPagerAdapterItems = (<any>this._pagerAdapter).items;
 
         // if both values are null, should not update