Fix crash on Huawei device with AndroidView (flutter/engine#9192)

Fixes a rare NullPointerException on Huawei devices:
```
Stacktrace:
java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.DisplayAdjustments android.view.Display.getDisplayAdjustments()' on a null object reference
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1793)
...
```

engine/src/flutter/shell/platform/android/io/flutter/plugin/platform/VirtualDisplayController.java

@@ -151,6 +151,8 @@ class VirtualDisplayController {
 
     public void dispose() {
         PlatformView view = presentation.getView();
+        // Fix rare crash on HuaWei device described in: https://github.com/flutter/engine/pull/9192
+        presentation.cancel();
         presentation.detachState();
         view.dispose();
         virtualDisplay.release();