Do not statically link ike-stubs

Stub jars should not be in statically linked except for inside
other stub jars.

Bug: 145995723
Test: build, flash and reboot
Test: FrameworksIkeTests, FrameworksNetTests
Change-Id: I503616de0143cc39dd189ae689de3e8d77c345da
Merged-In: I503616de0143cc39dd189ae689de3e8d77c345da
(cherry picked from commit 5fc0bbaa)