Move screen recording indicator icon into separate privacy chip

The new screen recording privacy indicator chip expands and collapses
together with the existing mic/camera chip.
When it collapses, it does not collapse into a dot like the mic/camera
chip, but the screen recording icon stays visible.

Bug: 184629645
Test: m SystemUI CarSystemUI ArcSystemUI
Test: Manual on TV, observe privacy indicators
Change-Id: I77745f9d202f03fb20e3ce5c77c3c50d0e00a153