arrow

GH-43506: [Java] Fix TestFragmentScanOptions result not match (#43639)



### Rationale for this change
JNI test was not tested in CI. So the test failed but passed the CI.
The parseChar function should return char but return bool, a typo error.

### What changes are included in this PR?

### Are these changes tested?
Yes

### Are there any user-facing changes?
No

* GitHub Issue: #43506

Authored-by: Chengcheng Jin <chengcheng.jin@intel.com>
Signed-off-by: David Li <li.davidm96@gmail.com>