Move conditional stuff from dashboard/ to homepage package.

dashboard package is not a real place for homepage stuff. Putting
Conditionals here makes it easier to refactor it for new homepage in the
future

Bug: 110405144
Bug: 112485407
Test: robotests
Change-Id: If433aeac8766124f0f4f6e5786b93ac1372bb745

src/com/android/settings/homepage/conditional/FocusRecyclerView.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2015, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.settings.homepage.conditional;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.RecyclerView;
+
+/**
+ * Version of RecyclerView that can have listeners for onWindowFocusChanged.
+ */
+public class FocusRecyclerView extends RecyclerView {
+
+    private FocusListener mListener;
+
+    public FocusRecyclerView(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public void onWindowFocusChanged(boolean hasWindowFocus) {
+        super.onWindowFocusChanged(hasWindowFocus);
+        if (mListener != null) {
+            mListener.onWindowFocusChanged(hasWindowFocus);
+        }
+    }
+
+    public void setListener(FocusListener listener) {
+        mListener = listener;
+    }
+
+    public interface FocusListener {
+        void onWindowFocusChanged(boolean hasWindowFocus);
+    }
+}