Adding Tapl tests for User Installed App in PS.

This test verifies that a user installed app
is shown above the sys apps divider, within the
Private Space container.

Bug: 322882655
Test: atest NexusLauncherTests:com.android.quickstep.TaplPrivateSpaceTest
Flag: NA
Change-Id: Id85105339ae45c263d9ef52a3bb55784587e887d