Don't delete META-INF in jack-java-to-dex when packing resources.

LOCAL_DONT_DELETE_JAR_META_INF is meant for deleting resources carried
by static Java libraries, see comment in clear_vars.mk.
For a module's own resources, we should pick up whatever in
LOCAL_JAVA_RESOURCE_DIRS.
The same applies  when building .jack from a  prebult jar in
transform-jar-to-jack.

Bug: 25860887
Change-Id: I20c120e039342a1124362c5f8747eace94b03931
(cherry-pick from commit 996ae38f)