Dialer: Remove WRITE_EXTERNAL_STORAGE permission

* Callrecording has been moved away from using the external storage
  in lineage-17.1 in commit 05afe35d
* On R or higher, the permission has no effect, resulting in recordings
  to not work since the request for the permission always fails
* Auto-migration also fails due to that
* It's 2023 and 3 versions later (with the 4th being worked on), whoever
  hasn't got the recordings migrated yet won't do so anymore, anyway

Change-Id: I38182b7d22895cc8f7c6cfec1776b93e2a705e16