Add uses-permission declaration for android.permission.POST_PROMOTED_NOTIFICATIONS

[WesUnwin]

Adds the missing POST_PROMOTED_NOTIFICATIONS non-runtime permission, which is at least one reason why (on certain versions of Android that the resulting CallStyle notifications launched in this plugin were not eligible for promotion / classification as live update notifications:

https://developer.android.com/develop/ui/views/notifications/live-update

[jerry2013]

screenshots of what the user sees/experiences please.

[WesUnwin]

If full screen alerts are disabled, an expanded lock screen card is shown like:

If full screen alerts are enabled, they see:

[WesUnwin]

When not "promoted" (before this) you often hear the notification and can see it in the notifications shade, but don't see it directly on the lock screen.

[WesUnwin]

Complete UI / UX diagram: https://docs.google.com/drawings/d/1ccL-BhMlYNlx5qHrQSK463Je2ATh-0CGDDGvTGk2F-w/edit?pli=1

[WesUnwin]

On my phone with this, am now directly getting this on lock screen (have full screen alerts enabled:

[jerry2013]

as long as this doesn't make app store approval a worse experience.

ps. do other apps declare this permission?

[WesUnwin]

I believe so I've been looking at several sample apps online, and they seem to commonly use a combination of full-screen intents + call style notifications + high priority, promoted notifications.

The good news is it won't complicate google play stuff - the previously added full screen permission will (but I'll take care of this)