BREAKING CHANGES:
`Application.orientation` is no longer a function.
Migration: Remove `()` from the `Application.orientation()` call:
```diff
import { Application } from "@nativescript/core";
-console.log(Application.orientation());
+console.log(Application.orientation);
```
`Application.systemAppearance` is no longer a function.
Migration: Remove `()` from the `Application.systemAppearance()` call:
```diff
import { Application } from "@nativescript/core";
-console.log(Application.systemAppearance());
+console.log(Application.systemAppearance);
```
On android `suspend/resume` was not doing what was expected.
In particular it was called while showing dialogs. This adds new `background` and `foreground` events which will fire expectedly and consistently for ios and android.
