Settings new dashboard - part 2

Introduce the new Dashboard (a grid like presentation of
Settings top categories) per UX specification.

- the Dashboard is composed of "categories" and in each of them
you have "tiles"
- implement a new layout for showing top categories
(DashboardContainerView). This layout basically acts like a
grid
- depending on the device configuration make the grid with 1
column in portrait / 2 colums in landscape (phones) OR 2 columns
in portrait and 3 in landscape (tablets)
- take care of Accounts adding and removing (as it changes the
number of tiles to show)

Also remove all the old code related to Headers

Change-Id: Ie29944132c1b4c3f7b073d5a7d4453b8f5ec19a7

res/values-sw600dp/config.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2014 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.
+-->
+
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+
+    <!-- Dashboard number of columns -->
+    <integer name="dashboard_num_columns">2</integer>
+
+</resources>

res/values-sw600dp/dimens.xml

@@ -38,4 +38,8 @@
     <dimen name="keyguard_appwidget_picker_margin_left">2dip</dimen>
     <dimen name="keyguard_appwidget_picker_margin_right">2dip</dimen>
     <integer name="keyguard_appwidget_picker_cols">2</integer>
+
+    <!-- Dashboard padding between each tiles within the layout -->
+    <dimen name="dashboard_cell_gap">8dp</dimen>
+
 </resources>