[Java] reduce branches in algo for first match in VectorRangeSearcher

[asfimport]

This is a follow up Jira for the improvement suggested by @fsaintjacques in the PR for 

#4925

 

Reporter: Pindikura Ravindra / @pravindra
Assignee: Liya Fan / @liyafan82

PRs and other links:

• GitHub Pull Request #5011

_{Note: This issue was originally created as ARROW-6093. Please see the migration documentation for further details.}

[asfimport]

Micah Kornfield / @emkornfield:
Issue resolved by pull request 5011
#5011