Add city to United Arab Emirates (AE)

[khiminrm]

https://www.drupal.org/project/address/issues/3561695

[khiminrm]

Created PR #236

[bojanz]

I have found no proof that UAE uses a locality field in their addressing. The UPU document only shows an emirate:
https://www.upu.int/UPU/media/upu/PostalEntitiesFiles/addressingUnit/areEn.pdf

Perhaps you have an example from emiratespost.ae or a government source?