Revert "Move service-connectivity to the tethering APEX"

Revert submission 1532910-connectivity_jar_in_apex

Reason for revert: Breaks boot tests: b/176969905
Reverted Changes:
Ie41a5b569:Set setCurrentProxyScriptUrl as public
Id7b6a4664:Move service-connectivity to the tethering APEX
Ia7cb83834:Add service-connectivity to tethering APEX

Change-Id: I1c369dd8a6527513f8fc1a5cacde59d78d104c7e
(cherry picked from commit 3e157018f7745956e03bc82324ef4921366a43fc)
8 files changed