Unbanish memory screen and new UX

Give memory screen a makeover so that it looks nice enough to be
restored to its rightful home.

Bug: 20694769
Change-Id: I2f6933037b3fbbfb0d9fe5e3ca821ef59e171faa

src/com/android/settings/applications/SpacePreference.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 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.applications;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.preference.Preference;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewGroup.LayoutParams;
+import android.widget.Space;
+
+/**
+ * A blank preference that has a specified height by android:layout_height.  It can be used
+ * to fine tune screens that combine custom layouts and standard preferences.
+ */
+public class SpacePreference extends Preference {
+
+    private int mHeight;
+
+    public SpacePreference(Context context, AttributeSet attrs) {
+        this(context, attrs, com.android.internal.R.attr.preferenceStyle);
+    }
+
+    public SpacePreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public SpacePreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+
+        final TypedArray a = context.obtainStyledAttributes(attrs,
+                new int[] { com.android.internal.R.attr.layout_height }, defStyleAttr, defStyleRes);
+        mHeight = a.getDimensionPixelSize(0, 0);
+    }
+
+    public void setHeight(int height) {
+        mHeight = height;
+    }
+
+    @Override
+    protected View onCreateView(ViewGroup parent) {
+        return new Space(getContext());
+    }
+
+    @Override
+    protected void onBindView(View view) {
+        super.onBindView(view);
+
+        LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, mHeight);
+        view.setLayoutParams(params);
+    }
+
+}