Add push notification extensions (#4005)

* add wav

* add sound to config

* add extension to `updateExtensions.sh`

* add ios source files

* add a build extension

* add a new module

* use correct type on ios

* update the build plugin

* add android handler

* create a patch for expo-notifications

* basic android implementation

* add entitlements for notifications extension

* add some generic logic for ios

* add age check logic

* add extension to app config

* remove dash

* move directory

* rename again

* update privacy manifest

* add prefs storage ios

* better types

* create interface for setting and getting prefs

* add notifications prefs for android

* add functions to module

* add types to js

* add prefs context

* add web stub

* wrap the app

* fix types

* more preferences for ios

* add a test toggle

* swap vars

* update patch

* fix patch error

* fix typo

* sigh

* sigh

* get stored prefs on launch

* anotehr type

* simplify

* about finished

* comment

* adjust plugin

* use supported file types

* update NSE

* futureproof ios

* futureproof android

* update sound file name

* handle initialization

* more cleanup

* update js types

* strict js types

* set the notification channel

* rm

* add silent channel

* add mute logic

* update patch

* podfile

* adjust channels

* fix android channel

* update readme

* oreo or higher

* nit

* don't use getValue

* nit

modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandlerModule.web.ts

@@ -0,0 +1,27 @@
+import {
+  BackgroundNotificationHandlerPreferences,
+  ExpoBackgroundNotificationHandlerModule,
+} from './ExpoBackgroundNotificationHandler.types'
+
+// Stub for web
+export const BackgroundNotificationHandler = {
+  getAllPrefsAsync: async () => {
+    return {} as BackgroundNotificationHandlerPreferences
+  },
+  getBoolAsync: async (_: string) => {
+    return false
+  },
+  getStringAsync: async (_: string) => {
+    return ''
+  },
+  getStringArrayAsync: async (_: string) => {
+    return []
+  },
+  setBoolAsync: async (_: string, __: boolean) => {},
+  setStringAsync: async (_: string, __: string) => {},
+  setStringArrayAsync: async (_: string, __: string[]) => {},
+  addToStringArrayAsync: async (_: string, __: string) => {},
+  removeFromStringArrayAsync: async (_: string, __: string) => {},
+  addManyToStringArrayAsync: async (_: string, __: string[]) => {},
+  removeManyFromStringArrayAsync: async (_: string, __: string[]) => {},
+} as ExpoBackgroundNotificationHandlerModule