Iterate on storage UI.

Support both grid and list view of documents.  Show breadcrumb
navigation trail in action bar.  Start supporting file and directory
creation.

Change-Id: I93a973da7b0d4387a57fe719e7bb20944adb0290
diff --git a/res/layout/item_doc_list.xml b/res/layout/item_doc_list.xml
new file mode 100644
index 0000000..85fca79
--- /dev/null
+++ b/res/layout/item_doc_list.xml
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2013 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.
+-->
+
+<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:minHeight="?android:attr/listPreferredItemHeight"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
+    android:paddingTop="8dip"
+    android:paddingBottom="8dip"
+    android:columnCount="3">
+
+    <ImageView
+        android:id="@android:id/icon"
+        android:layout_width="@android:dimen/app_icon_size"
+        android:layout_height="@android:dimen/app_icon_size"
+        android:layout_rowSpan="2"
+        android:layout_marginEnd="8dip"
+        android:scaleType="centerInside"
+        android:contentDescription="@null" />
+
+    <TextView
+        android:id="@android:id/title"
+        android:layout_width="0dip"
+        android:layout_gravity="fill_horizontal"
+        android:layout_marginTop="2dip"
+        android:layout_columnSpan="2"
+        android:singleLine="true"
+        android:ellipsize="marquee"
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        android:textAlignment="viewStart" />
+
+    <ImageView
+        android:id="@android:id/icon1"
+        android:layout_width="24dip"
+        android:layout_height="24dip"
+        android:layout_marginEnd="8dip"
+        android:visibility="gone"
+        android:scaleType="centerInside"
+        android:contentDescription="@null" />
+
+    <TextView
+        android:id="@android:id/summary"
+        android:layout_marginTop="2dip"
+        android:textAppearance="?android:attr/textAppearanceSmall" />
+
+</GridLayout>