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);
```
Cleanup type symbol usage by consolidating to manage in one spot. This makes them easier to use as well by providing a single rollup of all the common type symbol's used throughout core.
