Trimming: clean up the UI for trimming.

Get rid of the home button and use the done button only in the action bar.
Switch back to use system actionbar / activity.
Rename the ShortenExample.

bug:7093240

Change-Id: I61684e9723af12cecc212bbd911c23aab0258463
diff --git a/res/layout/trim_menu.xml b/res/layout/trim_menu.xml
new file mode 100644
index 0000000..d2af918
--- /dev/null
+++ b/res/layout/trim_menu.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2012 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.
+-->
+
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_centerVertical="true">
+    <TextView
+        android:id="@+id/start_trim"
+        android:layout_marginLeft="8dp"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:text="@string/done"
+        android:gravity="left|center_vertical"
+        android:drawableLeft="@drawable/ic_menu_save_holo_light"
+        android:drawablePadding="8dp" />
+</FrameLayout>