Privacy chip (2/many)

- Introduce StatusBarLocationPublisher to decouple the controlling of the
privacy dots and the status bar itself.
- Fix some code comments
- Fix RTL (mostly) for animations
- Animate the chip into the status bar left/right sides (based on rtl)
  so it always shows in the system area

Test: atest SystemUITests
Bug: 177323724

Change-Id: Ib76e9e19f4f70b77f30011b2aceebbeb6c870f81