Merge changes from topic "connectivity_jar_in_apex"

* changes:
  Move service-connectivity to the tethering APEX
  Set setCurrentProxyScriptUrl as public
tree: fe27a4aebc2f7e1a3404e7647379982296f6cf86
  1. core/
  2. service/
  3. services/
  4. tests/
  5. OWNERS