Add ForkJoinPool* threads to 911 Ignored regex

CTS tests now sometimes have a ForkJoinPool thread live during test
running. This thread needs to be ignored by our test.

Test: ./test.py --host
Test: atest CtsJvmtiRunTest911HostTestCases
Bug: 144234269
Change-Id: I3e9d64903f680ecdd6994d5ae1f1fa6362feda10
1 file changed