ART: Refactor test 911

Break out the different test cases. As the stack traces print line
numbers, this will reduce the amount of expected.txt churn when
new tests are added.

Bug: 31684812
Test: m test-art-host-run-test-911-get-stack-trace
Change-Id: I3b4cb80ec5dd851ebbdf25fd660038d20a9daa9e
9 files changed