Add new version of createUser performance test

Similar to what was done for switchUser, this commit adds a new version
of the createUser test. In this variation, a wait for cool down was added
in between iterations.

Bug: 261621873
Test: atest UserLifecycleTests#createUser_realistic
Change-Id: I6235c782254b2a19f9990994b664ad9ac5c6f2ce

apct-tests/perftests/multiuser/src/android/multiuser/UserLifecycleTests.java

@@ -179,6 +179,21 @@ public class UserLifecycleTests {
         }
     }
 
+    /** Tests creating a new user, with wait times between iterations. */
+    @Test(timeout = TIMEOUT_MAX_TEST_TIME_MS)
+    public void createUser_realistic() throws RemoteException {
+        while (mRunner.keepRunning()) {
+            Log.i(TAG, "Starting timer");
+            final int userId = createUserNoFlags();
+
+            mRunner.pauseTiming();
+            Log.i(TAG, "Stopping timer");
+            removeUser(userId);
+            waitCoolDownPeriod();
+            mRunner.resumeTimingForNextIteration();
+        }
+    }
+
     /** Tests creating and starting a new user. */
     @Test(timeout = TIMEOUT_MAX_TEST_TIME_MS)
     public void createAndStartUser() throws RemoteException {