Fix work profile promise icon bugs.

- We did not pass in the user when creating the workspace item infos.
- Added check for if app is installed before adding item to workspace
  to prevent any stale promise icons. This seems to happen when uninstalling
  and then immediately reinstalling an application.

Bug: 141556707
Change-Id: I2db2d8da449c37eb248a59fbc9e7b517f50855c1