Update the intent that monkey uses to launch application

The purpose of the monkey event is to imitate user action of
launching an app from launcher, and apparently launcher is
using one extra flag FLAG_ACTIVITY_RESET_TASK_IF_NEEDED

Bug: 6007633
Change-Id: Ie42cc84fd6235c9419b96bd9574056ed46687b25

cmds/monkey/src/com/android/commands/monkey/MonkeyActivityEvent.java

@@ -48,7 +48,7 @@ public class MonkeyActivityEvent extends MonkeyEvent {
         Intent intent = new Intent(Intent.ACTION_MAIN);
         intent.addCategory(Intent.CATEGORY_LAUNCHER);
         intent.setComponent(mApp);
-        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
         return intent;
     }