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
diff --git a/res/layout/dashboard_tile.xml b/res/layout/dashboard_tile.xml
new file mode 100644
index 0000000..03b4b09
--- /dev/null
+++ b/res/layout/dashboard_tile.xml
@@ -0,0 +1,58 @@
+<?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.
+-->
+
+<LinearLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center_vertical"
+        android:minHeight="72dp"
+        android:background="@android:color/white">
+
+    <ImageView
+            android:id="@+id/icon"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:scaleType="centerInside"
+            android:layout_marginStart="12dp"
+            android:layout_marginEnd="16dp"
+            />
+
+    <RelativeLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1" >
+
+        <TextView android:id="@+id/title"
+                  android:layout_width="wrap_content"
+                  android:layout_height="wrap_content"
+                  android:singleLine="true"
+                  android:textAppearance="?android:attr/textAppearanceMedium"
+                  android:ellipsize="marquee"
+                  android:fadingEdge="horizontal" />
+
+        <TextView android:id="@+id/status"
+                  android:layout_width="wrap_content"
+                  android:layout_height="wrap_content"
+                  android:layout_below="@android:id/title"
+                  android:layout_alignStart="@android:id/title"
+                  android:textAppearance="?android:attr/textAppearanceSmall"
+                  android:textColor="?android:attr/textColorSecondary"
+                  />
+
+    </RelativeLayout>
+
+</LinearLayout>
\ No newline at end of file