[Java] Arrow native reader load next batch importing vector from c causing performance degrade

### Describe the bug, including details regarding any error messages, version, and platform.

it seems the native reader is first read the data into c vector, then import it into java format, causing significant performance degrade.

I wonder if it is possible to read directly from c vector ?

### Component(s)

Java

Start with the Java Arrow native reader's load-next-batch path and the reported performance degradation. Profile the current import from a C vector into Java and determine whether direct reading is feasible; done requires measured improvement without changing reader results.

Written by the indexing model from the issue text.