Use vector

app/src/main/java/com/hippo/ehviewer/widget/ContentLayout.java

@@ -17,12 +17,11 @@ package com.hippo.ehviewer.widget;
 
 import android.content.Context;
 import android.graphics.Rect;
+import android.support.annotation.NonNull;
 import android.util.AttributeSet;
 
 import com.hippo.scene.StageLayout;
 
-import org.jetbrains.annotations.NotNull;
-
 public class ContentLayout extends StageLayout {
 
     private OnGetFitPaddingListener mOnGetFitPaddingListener;
@@ -50,7 +49,7 @@ public class ContentLayout extends StageLayout {
 
     @SuppressWarnings("deprecation")
     @Override
-    protected boolean fitSystemWindows(@NotNull Rect insets) {
+    protected boolean fitSystemWindows(@NonNull Rect insets) {
         mFitPaddingLeft = 0;
         mFitPaddingTop = 0;
         mFitPaddingRight = 0;