Scrolling down to locate PS after lock/unlock event.

This change fixes TAPL tests by:
1. Scrolling down to locate PS, in case the scrollbar moves after lock/unlock.
2. Retrying lock/unlock, as sometimes, the request is cancelled by UserManager (if the profile is already in that state)

Bug: 345556016
Test: atest TaplPrivateSpaceTest
Flag: NONE Tapl fix tweak.
Change-Id: Ic0cc3259a2f92065a699d694c47f65c5f68934b8