HSUM user fixes for ChooserActivityTest

This CL contains two fixes for the ChooserActivityTest:
- Set the work profile id based on HSUM or non HSUM.
- Create a list controller mock based on the overriden work profile and
  not on system user.

With both of these together, tests are not crashing anymore on HSUM, and
the testWorkTab_workUserNotRunning_workTargetsShown test succeeds.

Other tests are still failing and more work will be required to make
those tests HSUM-compatible.

Fix: 383079863
Test: atest com.android.internal.app.ChooserActivityTest
Flag: EXEMPT TEST_ONLY
Change-Id: I7b744f1bd78b2a48f9b71b3b3c6e4259e5e4f56d