Changes required to use MaskableIconDrawable inside Launcher3
This CL will bake the legacy icons inside a grey background

Note: There will be follow up CL to change the color and shadow of the
legacy icon. The idea of this CL is to first test if MaskableIconDrawable
methods and class work properly.

Bug: 32063838
Bug: 33553066

Change-Id: I3d02e619fcb0cd9879baa22a025b5d95c829f26c
3 files changed