Revert "chore(magnification): add magnification sysui connection..."

Revert submission 27352312-a11yMagCts

Reason for revert: This approach may have some overheads for client services start up, one potential case is sysui connection taking too much time then the service will not get onServiceConnected and start serving. As b/337800504#comment29

Reverted changes: /q/submissionid:27352312-a11yMagCts

Change-Id: I490fd3d194baab6edfc672a3ae0100b9eec963a5