Revert "Set setCurrentProxyScriptUrl as public"

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: I634242e3dbdab9f900b05410d5d208c5ae19ddb9
1 file changed