Remove enableLayoutTransitions for private space.

Get rid of layoutTransitions as they are not reliable, see here: https://docs.google.com/document/d/1ExSemBvzzVv-I9tUCVzdLeN-lDb2hTSOM886UYSH-Qk/edit?usp=sharing&resourcekey=0-aBCCLnrB7KtkhIeyUOkKyw
Instead use actual animatorSet to do the animating.
- This also fixes the timings so that the pill transition happens at the same time of the icon alpha animation.
Made member variable for lockText and settingButton.

bug:346298256
Test:
before: See bug
after manually- video: https://drive.google.com/file/d/1B7PIgrGWMJTphc1b5CvCkyg-QYx3TTN3/view?usp=sharing
Flag: com.android.launcher3.enable_private_space

Change-Id: I049b84dbe1279a0becb090db8660975dc5c5961e