Adding TAPL tests for Private Space in Quickstep.

This CL adds an initial test, that creates
private profile and verifies the elements
present in unlocked state.

More tests will be followed in next CL.

Doc: go/private-space-tapl

Bug: 322882655
Test: TaplPrivateSpaceTest
Flag: NA
Change-Id: I6032f4531818031991a5d51e23cfad22518250e6