[edje] Add support for map zoom to use other part center

[edje] Add support for map zoom to use other part center

Current:
In edc, zoom is supposed to happen from object center, there is no way to
change the center of the zoom.

Changes:
Adding support to change the center of zooming just like map rotation by using
other part's center.

@feature

Url: https://phab.enlightenment.org/D9115

Change-Id: I05a08c6182c610773fb4cdacae35e2824444d4f1
Signed-off-by: Godly T.Alias <godlytalias@yahoo.co.in>