feat(android): types for API Level 30 and cleanup (#9219)

API Level 30 is now included. Also the `native` namespace used for Android/Java typings no longer collides with integrations.

BREAKING CHANGE:

If you were using`native.Array` for any of your own custom plugin typings, you can switch them to `androidNative.Array`

BEFORE:

```
public writeAsync(path: string, bytes: native.Array<number>) ...
```

AFTER:

```
public writeAsync(path: string, bytes: androidNative.Array<number>) ...
```

packages/types-android/src/lib/android-30.d.ts

@@ -0,0 +1,3 @@
+/// <reference path="./android/android-platform-30.d.ts" />
+/// <reference path="./android/androidx-30.d.ts" />
+/// <reference path="./android/common.d.ts" />

packages/types-android/src/lib/android/android-declarations.d.ts

@@ -18,6 +18,7 @@ interface ArrayConstructor {
     create(type: any, count: number): any;
 }
 
-declare module native {	export class Array<T> {	constructor(); length: number; [index: number]: T; } }
+declare module androidNative {	export class Array<T> {	constructor(); length: number; [index: number]: T; } }
 
 import globalAndroid = android;
+