Move android_icu4j_resources to a filegroup

Compiling the resources into a no-sources jar that is used by
libcore would have needed the newly-required system_modules
property to go along with no_standard_libs.  Move it to a
filegroup instead.

Test: resources still exist in core-libart.
Change-Id: I465fae2fb67caaf28463c5c550125eef5deb742a
1 file changed