1) Fixing missing shadow from shortcut icons
2) Chaning all-apps icon rendering to draw background/foreground separately
This allows us to reuse the bitmap generated for themed icons, instead of
creating a new everytime
Bug: 248308987
Test: Verified on device
Change-Id: Ia3cbefb21a2ce676d6bb2df3d9375d61b5bed61b
Test: manual - build launcher3, enable the feature flag on tablet with
a valid app installed, open an app, observe that there
is NO button in taskbar because launcher3 doesn't have
populated config
Bug: 237678727
Change-Id: Ic261608898eb9a9220cffacd0c6060a32c10a74f
Sunny Goyal
Mady Mellor