Update data usage UX

Update the UX and dig the data usage screen out of a huge whole of
technical debt.  Switch every to use Preferences rather than standard
layouts and ListViews.

Split data usage into several fragments, all separated.

DataUsageSummary:
 - Shows a summary of the 'default' usage at the top, this will be
   the default sim on phones, or wifi if it has it, or ethernet
   as last attempt to show something.
 - Also has individual categories for each network type that has
   data, cell, wifi, and ethernet. Maybe should look into bt though?

DataUsageList:
- Takes a NetworkTemplate as an input, and can only be reached from
  the network specific categories in DataUsageSummary
- Shows a graph of current usage for that network and links to
  app detail page for any app.
- Has gear link to quick get to billing cycle screen if available

BillingCycleSettings:
 - Just a screen with the cycle day and warning/limits separated
   out from the data usage.

AppDataUsage:
 - App specific data usage details
 - May need some UX iteration given lack of clarity in the spec

Bug: 22459566
Change-Id: I0222d8d7ea7b75a9775207a6026ebbdcce8f5e46

src/com/android/settings/SummaryPreference.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2016 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;
+
+import android.content.Context;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceViewHolder;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.TextView;
+import com.android.settings.applications.LinearColorBar;
+
+/**
+ * Provides a summary of a setting page in a preference.  Such as memory or data usage.
+ */
+public class SummaryPreference extends Preference {
+
+    private static final String TAG = "SummaryPreference";
+    private String mAmount;
+    private String mUnits;
+
+    private int mLeft, mMiddle, mRight;
+    private float mLeftRatio, mMiddleRatio, mRightRatio;
+    private String mStartLabel;
+    private String mEndLabel;
+
+    public SummaryPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setLayoutResource(R.layout.settings_summary_preference);
+        mLeft = context.getColor(R.color.summary_default_start);
+        mRight = context.getColor(R.color.summary_default_end);
+    }
+
+    public void setAmount(String amount) {
+        mAmount = amount;
+        if (mAmount != null && mUnits != null) {
+            setTitle(TextUtils.expandTemplate(getContext().getText(R.string.storage_size_large),
+                    mAmount, mUnits));
+        }
+    }
+
+    public void setUnits(String units) {
+        mUnits = units;
+        if (mAmount != null && mUnits != null) {
+            setTitle(TextUtils.expandTemplate(getContext().getText(R.string.storage_size_large),
+                    mAmount, mUnits));
+        }
+    }
+
+    public void setLabels(String start, String end) {
+        mStartLabel = start;
+        mEndLabel = end;
+        notifyChanged();
+    }
+
+    public void setRatios(float left, float middle, float right) {
+        mLeftRatio = left;
+        mMiddleRatio = middle;
+        mRightRatio = right;
+        notifyChanged();
+    }
+
+    public void setColors(int left, int middle, int right) {
+        mLeft = left;
+        mMiddle = middle;
+        mRight = right;
+        notifyChanged();
+    }
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder holder) {
+        super.onBindViewHolder(holder);
+
+        LinearColorBar colorBar = (LinearColorBar) holder.itemView.findViewById(R.id.color_bar);
+        colorBar.setRatios(mLeftRatio, mMiddleRatio, mRightRatio);
+        colorBar.setColors(mLeft, mMiddle, mRight);
+
+        if (!TextUtils.isEmpty(mStartLabel) || !TextUtils.isEmpty(mEndLabel)) {
+            holder.findViewById(R.id.label_bar).setVisibility(View.VISIBLE);
+            ((TextView) holder.findViewById(android.R.id.text1)).setText(mStartLabel);
+            ((TextView) holder.findViewById(android.R.id.text2)).setText(mEndLabel);
+        } else {
+            holder.findViewById(R.id.label_bar).setVisibility(View.GONE);
+        }
+    }
+}