java a11y tests: Don't rely on specific implementation name

Adjust the AccessibleDropDownComboBox Java a11y
test to not rely on the object implementing
the logic to report a service name containing
"AccessibleDropDownComboBox".
The fact that VCLXAccessibleDropDownComboBox
currently does so is an implementation detail
that will change in an upcoming commit.

Change-Id: Ife12f14cb48b039379ddca2d9c32eedbfdefefcc
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/200967
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Tested-by: Jenkins

qadevOOo/tests/java/mod/_toolkit/AccessibleDropDownComboBox.java

@@ -78,10 +78,7 @@ public class AccessibleDropDownComboBox extends TestCase {
 
         XAccessible xRoot = AccessibilityTools.getAccessibleObject(xWindow);
 
-        oObj = AccessibilityTools.getAccessibleObjectForRole(xRoot, AccessibleRole.COMBO_BOX,
-                                             "", "AccessibleDropDownComboBox");
-
-        log.println("ImplementationName " + utils.getImplName(oObj));
+        oObj = AccessibilityTools.getAccessibleObjectForRole(xRoot, AccessibleRole.COMBO_BOX);
 
         TestEnvironment tEnv = new TestEnvironment(oObj);
 
@@ -120,4 +117,4 @@ public class AccessibleDropDownComboBox extends TestCase {
     protected void cleanup(TestParameters Param, PrintWriter log) {
         util.DesktopTools.closeDoc(xTextDoc);
     }
-}
+}