[Java] Fix `listRecording` to not return anything is recording is pur… #4085

Job	Run time
C++ Slow System Tests Clang 19	19m 39s
C++ Sanitise Build GCC 14	19m 39s
C++ Slow System Tests GCC 14	19m 40s
C++ Sanitise Build Clang 19	19m 40s
C++ Slow System Tests MSVC	19m 30s
JavaDoc (JDK 17, ubuntu-24.04)	1m 34s
Java Slow Tests (JDK 17, ubuntu-24.04)	19m 37s
JavaDoc (JDK 21, ubuntu-24.04)	1m 39s
Java Slow Tests (JDK 17, windows-latest)	19m 25s
Java Slow Tests (JDK 17, macos-latest)	19m 41s
Java Slow Tests (JDK 21, ubuntu-24.04)	19m 39s
Java Slow Tests (JDK 21, windows-latest)	19m 25s
Java Slow Tests (JDK 21, macos-latest)	19m 21s
Java Slow Tests (JDK 23, ubuntu-24.04)	19m 39s
Java Slow Tests (JDK 23, windows-latest)	19m 24s
Java Slow Tests (JDK 23, macos-latest)	19m 1s
	4h 36m 33s

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