fix(android): nested dialog/fragment handling (#9495)

apps/ui/src/modal-view/nested-nested-frame.xml

@@ -0,0 +1,9 @@
+<Page xmlns="http://schemas.nativescript.org/tns.xsd"
+  navigatingTo="navigatingTo"
+  loaded="onLoaded" unloaded="onUnloaded" backgroundColor="Red">
+  <StackLayout backgroundColor="PaleGreen" margin="10">
+    <Label text="{{ context }}"/>
+    <Button text="Show Alert" tap="{{ onTap }}"/>
+    <Button text="Open Nested Frames" tap="{{ openNestedFrames }}" />
+  </StackLayout>
+</Page>