Remove redundant clickUiObject method

Remove the clickUiObject method from the base class and refactor the
gmail workload to use clickAndWaitForWindow methods instead. For quick
popup menus prefer simple click events.

wlauto/external/uiauto/src/com/arm/wlauto/uiauto/BaseUiAutomation.java

@@ -143,12 +143,6 @@ public class BaseUiAutomation extends UiAutomatorTestCase {
         return object;
     }
 
-    public void clickUiObject(UiObject uiobject, long timeout) throws Exception {
-        if (!uiobject.clickAndWaitForNewWindow(timeout)) {
-            throw new UiObjectNotFoundException(String.format("Timeout waiting for New Window"));
-        }
-    }
-
     public int getDisplayHeight () {
         return getUiDevice().getInstance().getDisplayHeight();
     }