Remove native printing from test 980 and reliance on print internals

In preparation for a making a CTS test out of this make the test not
rely on internal allocation patterns of the 'System.out' object and
not make use of std::cout.

Test: ./test.py --host -j40
Change-Id: Ib7e874aaec71f93e834cf94ac5fe96663536691a
6 files changed