[Java] Improve `BaseRepeatedValueVector` function on `isEmpty` and `isNull` operations

[vibhatha]

Describe the enhancement requested

Referring to ListVector base class BaseRepeatedValueVector at https://github.com/apache/arrow/blob/main/java/vector/src/main/java/org/apache/arrow/vector/complex/BaseRepeatedValueVector.java#L358-L367, the isEmpty and isNull returns a default value which is rather misleading. Since the sub-class contains the functionality, it would be better to make it abstract or throw as discussed here.

Component(s)

Java

[lidavidm]

Issue resolved by pull request 41601
#41601