MessageView: UI: change prev/next arrows, re-enable notification bar shadow.

Bug: 2149187.

res/drawable/btn_arrow_background.xml

@@ -21,4 +21,5 @@
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_pressed="true" android:drawable="@drawable/btn_icon_bg_pressed" />
     <item android:state_focused="true" android:drawable="@drawable/btn_icon_bg_focused" />
+    <!-- <item android:drawable="@drawable/bg_arrow_unselected" /> -->
 </selector>

res/drawable/btn_arrow_left.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2009, 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.
+*/
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_focused="true" android:drawable="@drawable/ic_btn_arrow_left_focus" />
+    <item android:drawable="@drawable/ic_btn_arrow_left_unselected" />
+</selector>

res/drawable/btn_arrow_right.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 2007, 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.
+*/
+-->
+
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_focused="true" android:drawable="@drawable/ic_btn_arrow_right_focus" />
+    <item android:drawable="@drawable/ic_btn_arrow_right_unselected" />
+</selector>

res/layout/message_view.xml

@@ -44,16 +44,16 @@
                     android:layout_width="40dip"
                     android:layout_alignParentLeft="true"
                     android:layout_alignParentTop="true"
-                    android:src="@drawable/ic_left_prev_arrow_default"
-                    android:background="@drawable/btn_prev_next" />
+                    android:src="@drawable/btn_arrow_left"
+                    android:background="@drawable/btn_arrow_background" />
                 <ImageButton
                     android:id="@+id/next"
                     android:layout_height="35dip"
                     android:layout_width="40dip"
                     android:layout_alignParentRight="true"
                     android:layout_alignParentTop="true" 
-                    android:src="@drawable/ic_right_next_arrow_default"
-                    android:background="@drawable/btn_prev_next" />
+                    android:src="@drawable/btn_arrow_right"
+                    android:background="@drawable/btn_arrow_background" />
             </RelativeLayout>
 
             <include layout="@layout/message_view_header" />

src/com/android/email/activity/MessageView.java

@@ -315,7 +315,6 @@ public class MessageView extends Activity implements OnClickListener {
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
-        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
         setContentView(R.layout.message_view);
 
         mSubjectView = (TextView) findViewById(R.id.subject);