SystemUI: screenrecord: Remove blinking stop dot

Useless now with the chip

This includes (but not limited to) these partial / full reverts:
(A lot was adapted by me in merges, so mostly manaul removal rather than a revert)

Revert "Screenrecord: Remember last used blinking dot position"

This reverts commit dd788f2225cdc8b69bac556d0bc2b5449fbc7b4f.

Revert "Screenrecord: add blinking stop dot and low quality options"

This reverts commit 6b444928dd0d7502c92bdf5b08760b6c301b5903.

Change-Id: I8aabc38b9bf37e71145c93b63ab60c15dff4407d