Revert "Move Automatic System Updates from Developer Options to ..."

Revert submission 15552651-cherrypick-automatic-system-update-n9jr24y6ba

Reason for revert: Legal team decided to have this entry in GMS, so we can move this setting item back.
Reverted Changes:
Iaea3e11d9:Move Automatic System Updates from Developer Optio...
I077607a6a:Move Automatic System Updates from Developer Optio...

Change-Id: If000388f2dd0f9e3e06a29dcbdd362181d1bfd47
Bug: 196297425