Adding Tapl test for locking/unlocking Private Space

In this test:
1. Private Space is created.
2. Lock Button is clicked, locked view is verified.
3. Unlock Button is clicked, unlocked view is verified.
4. Private Space is removed.

Doc: go/private-space-tapl

Bug: 322882655
Test: TaplPrivateSpaceTest
Flag: NA
Change-Id: I1c399a96ea14a4464113576d31eed8db1caf1f2a