evas json: Load mask property from rlottie.

evas json: Load mask property from rlottie.

Summary:
   Load the mask information of the layer for implement the mask feature.
   The mask shape is transformed into a EFL_CANVAS_VG_CONTAINER and used like a matte.
   The mask interface uses the option implemented for matte temporarily.

Test Plan: N/A

Reviewers: Hermet

Reviewed By: Hermet

Subscribers: cedric, SanghyeonLee, #reviewers, smohanty, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D7891

Change-Id: I69830d0675ee2ec236fcac3c643323619581ef21