Review fixes for lettuce-common:library (open-telemetry#18182)

Co-authored-by: otelbot <197425009+otelbot@users.noreply.github.com>

Author: otelbot[bot]

instrumentation/lettuce/lettuce-common/library/src/test/java/io/opentelemetry/instrumentation/lettuce/common/LettuceArgSplitterTest.java

@@ -46,10 +46,10 @@ private static Stream<Arguments> providesArguments() {
   }
 
   private static class Parameter {
-    final String args;
-    final List<String> result;
+    private final String args;
+    private final List<String> result;
 
-    Parameter(String query, List<String> result) {
+    private Parameter(String query, List<String> result) {
       this.args = query;
       this.result = result;
     }