ART: Fix GetErrorName.

Add missing case for JVMTI_ERROR_THREAD_SUSPENDED. Also return
JVMTI_ERROR_ILLEGAL_ARGUMENT for unspecified inputs.

Refactor the code
* Remove the switch default case for case checking
* Use a lambda to unify the return code. This saves 4K of so size.

Add a test.

Bug: 38133825
Test: m
Test: art/test/testrunner/testrunner.py -b --host -t 901
Change-Id: If46b276b8abcd8b7b8ebbac1106f6b840761b997