Summary: @public Initial RCTImageView implementation only supported 'src', 'tintColor' and 'resizeMode'. This diff adds support for the rest of the properties: 'borderColor', 'borderWidth' and 'borderRadius'. `AbstractDrawBorders` class is reused in a follow up diff to draw borders for 'RCTView'.
Reviewed By: sriramramani
Differential Revision: D2693560