Delete timeClonedSimpleDateFormat and re-add timeNewSimpleDateFormat.

It seems like the last time I tried "fixing" this bug I deleted the wrong test, and the original failure had remained. This corrects my previous mistake and re-adds the mistakenly deleted test.

Bug: 237633188
Test: atest ExpensiveObjectsPerfTest
Change-Id: I7c6b929e6e1f018ea9100367d30e1d6d3cdc9d17

apct-tests/perftests/core/src/android/libcore/regression/ExpensiveObjectsPerfTest.java

@@ -158,11 +158,10 @@ public class ExpensiveObjectsPerfTest {
     }
 
     @Test
-    public void timeClonedSimpleDateFormat() {
-        SimpleDateFormat sdf = new SimpleDateFormat();
+    public void timeNewSimpleDateFormat() {
         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
         while (state.keepRunning()) {
-            sdf.clone();
+            new SimpleDateFormat();
         }
     }