ART: Fix profile key for generated test profile.

Also fix JIT detection in the test 616-cha-miranda which
would otherwise fail after the test profile key fix.

Bug: 204740802
Test: testrunner.py --host --speed-profile
Test: testrunner.py --host -t 616-cha-miranda
Change-Id: I177982e5eb68292e3c569db6b6e0ac4112eba91e
2 files changed