add some scripts

autojs/src/main/assets/modules/__general__.js

@@ -35,4 +35,11 @@ module.exports = function(__runtime__, scope){
     scope.currentActivity = function(){
         return __runtime__.info.getLatestActivity();
     }
+
+    scope.waitActivity = function(activity, delay){
+        delay = delay || 200;
+        while(scope.currentActivity() != activity){
+            sleep(delay);
+        }
+    }
 }