Add requestPermissions() for push notifications / Local Notifications

I’d like to be able to check if the user has granted permission for notifications. This way we tell them to change it in their settings, etc.

Proposed methods LocalNotifications.checkPermissions() or App.checkPermissions() (returns object of entire app permissions)

[jcesarmobile]

I went with LocalNotifications.areEnabled(), as it’s not really a permission and the name is closer to the native one.

const areEnabled = await LocalNotifications.areEnabled();
console.log('are notifications enabled?', areEnabled.value);

[jcesarmobile]

No, on Android there are no permissions for notifications. If they are disabled, they are disabled, but there is no way for requesting the permission that doesn’t exist, you’ll have to continue prompting with a custom message to tell the users to enabled them.