Enable app name/icon fetch on work profile apps.

Previously, apps that are exclusive to work profiles would not have
their app name or icon show up. This has been fixed by getting the
application info through mTaskInfo rather than loading it through
PackageManager.

Bug: 319523047
Test: Manual; confirm work profile exclusive apps now have their details
loaded and that other apps are not affected.
Test: atest DesktopModeWindowDecorationTests

Change-Id: I1879e3e64b62556b0f242fa6a73bbc7258831bc7