Remove JILL, JACK_JAR and JILL_JAR

Also ensure that sdk.atree can find jack.jar and jill.jar from prebuilt.

Bug: 27372042

(cherry picked from commit 233584bb806202364544f964b63561a7350fdc97)

Change-Id: Ie266104e51c09fa21ccb09c1f27ad7068472965c
2 files changed