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: 201653912
Test: atest WMShellUnitTests
Merged-In: If4ab0590f4b850103411b6a2dccf2092bb06d563
Change-Id: Ia99fd2b9ddb05b95205bf923a1ac0f3922e54db7