[DO NOT MERGE] Provide IconProvider in sysui dagger

So that other components can get app icon throught it as well.
Like showing app icon as resizing hint while dragging divider bar in
split screen.

Bug: 202740435
Bug: 201653912
Test: atest WMShellUnitTests
Change-Id: I7cc10be4ebfe7f9aad5db036a595613546ca15c9