Use the proper logic on iOS to increment the badge (#4233)

modules/expo-background-notification-handler/src/ExpoBackgroundNotificationHandler.types.ts

@@ -31,6 +31,7 @@ export type ExpoBackgroundNotificationHandlerModule = {
     forKey: keyof BackgroundNotificationHandlerPreferences,
     value: string[],
   ) => Promise<void>
+  setBadgeCountAsync: (count: number) => Promise<void>
 }
 
 // TODO there are more preferences in the native code, however they have not been added here yet.

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

@@ -24,4 +24,5 @@ export const BackgroundNotificationHandler = {
   removeFromStringArrayAsync: async (_: string, __: string) => {},
   addManyToStringArrayAsync: async (_: string, __: string[]) => {},
   removeManyFromStringArrayAsync: async (_: string, __: string[]) => {},
+  setBadgeCountAsync: async (_: number) => {},
 } as ExpoBackgroundNotificationHandlerModule