feat(messaging): Support Android 13+ notification permissions

[CalumMurray]

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Close #321

[robingenz]

The permission POST_NOTIFICATIONS is only supported from Android 13 (API Level 33).
Capacitor 4 currently officially supports API level 32 (see this comment). API level 33 will be supported with Capacitor 5. For this reason, this PR has to wait until the release of Capacitor 5. In the meantime you can try to use the following plugin: https://github.com/hermitdemschoenenleben/capacitor-plugin-android-post-notifications-permission

[CalumMurray]

Thanks very much for the quick response. I've updated to hopefully fix the build error for when it comes time to merge.

As noted in some other comments, the problem is that targeting API level 32 and using an Android 13 device means that the permission is immediately prompted on first open, meaning we can't prime the user for permissions as is best practice. Do you have any insight into why using a forked version with this permission might cause any issues with Capacitor 4 running on older and newer Androids? Is there some feature in Android 13 that is incompatible with Capacitor 4?

[robingenz]

Unfortunately not. I would just give it a try and see if it works. I just can't merge this before Capacitor 5 is released because everyone would need to target API Level 33.

[robingenz]

@CalumMurray Can you please resolve the merge conflicts?

[CalumMurray]

Done. It's been a while since I looked at this, so let me know if it still looks alright.

[robingenz]

The last thing that is missing: we need to check the Android version and should only request the permission if it is >= Android 13.

Example: https://github.com/ionic-team/capacitor-plugins/blob/main/push-notifications/android/src/main/java/com/capacitorjs/plugins/pushnotifications/PushNotificationsPlugin.java#L78:L100

[robingenz]

Suggested change

	feat(messaging): Support Android 13+ notification permissions
	feat(android): support Android 13+ notification permission

[robingenz]

@CalumMurray I just implemented it in another PR so I can finally test the Capacitor 5 version. Thanks for the PR anyway!