Reland "Build mockwebserver with core_current"

core_current is a set of Android SDK having core Java APIs only. This
fixes the link-type check warning when this lib is used from an app
built with SDK.

Bug: 69899800
Test: m -j mockwebserver is succecssful
Test: m -j CtsVerifier does not show link-type warning on this
Test: master-art builds
Change-Id: I87d312fc5d104af76ab30fda7587b8559ac9d4d1