optimize memory and image size. remove unnecessary language file

autojs/src/main/java/com/stardust/autojs/runtime/api/AbstractConsole.java

@@ -4,7 +4,6 @@ import android.support.annotation.Nullable;
 import android.util.Log;
 
 import com.stardust.autojs.runtime.ScriptStopException;
-import com.stardust.autojs.runtime.api.Console;
 
 /**
  * Created by Stardust on 2017/5/1.
@@ -24,6 +23,12 @@ public abstract class AbstractConsole implements Console {
         return String.format(data.toString(), options);
     }
 
+    @Override
+    public void print(int level, Object data, Object... options) {
+        write(level, format(data, options));
+    }
+
+    protected abstract void write(int level, CharSequence data);
 
     @Override
     public void verbose(@Nullable Object data, Object... options) {

autojs/src/main/java/com/stardust/autojs/runtime/api/Console.java

@@ -16,6 +16,9 @@ public interface Console {
     @ScriptInterface
     void log(@Nullable Object data, Object... options);
 
+    @ScriptInterface
+    void print(int level, Object data, Object... options);
+
     @ScriptInterface
     void info(@Nullable Object data, Object... options);
 

autojs/src/main/java/com/stardust/autojs/runtime/api/UiSelector.java

@@ -151,7 +151,6 @@ public class UiSelector extends UiGlobalSelector {
         } else {
             super.id(id);
         }
-        Intent intent;
         return this;
     }
 
@@ -160,6 +159,11 @@ public class UiSelector extends UiGlobalSelector {
         return untilFind().performAction(action, arguments);
     }
 
+    public boolean exists() {
+        UiObjectCollection collection = find();
+        return collection != null && collection.size() > 0;
+    }
+
     @ScriptInterface
     public boolean click() {
         return performAction(ACTION_CLICK);