Revert "Remove abandoned implementation."

Revert submission 3242160-remove-messaging-package

Reason for revert: Droidmonitor created revert due to b/364617310, b/364626927, b/364617560

Reverted changes: /q/submissionid:3241481-remove-messaging-package

This reverts commit 93b5e63726ab8f47a8266ed1cccf7c9c281bf0e0.

Change-Id: I182cbf1758988d9a4950d39354266a5fb3aaabce
diff --git a/res/layout/widget_conversation.xml b/res/layout/widget_conversation.xml
new file mode 100644
index 0000000..2c7edee
--- /dev/null
+++ b/res/layout/widget_conversation.xml
@@ -0,0 +1,110 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright (C) 2015 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.
+-->
+
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="@dimen/widget_margin"
+    android:background="@android:color/transparent" >
+    <LinearLayout
+        android:id="@+id/widget_header"
+        android:layout_width="match_parent"
+        android:layout_height="48dp"
+        android:orientation="horizontal"
+        android:paddingLeft="10dip"
+        android:paddingRight="10dip"
+        android:layout_alignParentTop="true">
+        <TextView
+            android:id="@+id/widget_label"
+            style="@style/WidgetConversationTitle"
+            android:layout_height="wrap_content"
+            android:layout_width="0dip"
+            android:layout_weight = "1"
+            android:layout_gravity="center_vertical"
+            android:freezesText="true" />
+        <ImageView
+            android:id="@+id/launcher_icon"
+            android:src="@drawable/ic_launcher"
+            android:layout_height="wrap_content"
+            android:layout_width="0dip"
+            android:layout_weight = "1"
+            android:scaleType="fitStart"
+            android:paddingTop="12dip"
+            android:paddingBottom="12dip"
+            android:visibility="gone"
+            android:importantForAccessibility="no" />
+        <ImageButton
+            android:id="@+id/widget_goto_conversation_list"
+            style="@style/WidgetHeaderImage"
+            android:layout_width="@dimen/widget_header_new_conv_button_width"
+            android:layout_height="match_parent"
+            android:src="@drawable/ic_widget_list"
+            android:background="?android:attr/selectableItemBackground"
+            android:contentDescription="@string/widget_conversation_list_content_description"
+            android:layout_gravity="center_vertical" />
+    </LinearLayout>
+    <ListView
+        android:id="@+id/message_list"
+        android:layout_below="@+id/top_line"
+        android:layout_above="@+id/bottom_line"
+        android:layout_marginTop="-2dp"
+        android:layout_width="match_parent"
+        android:layout_height="0dip"
+        android:layout_weight="1"
+        android:drawSelectorOnTop="true"
+        android:transcriptMode="alwaysScroll"
+        android:stackFromBottom="true"
+        android:overScrollMode="never"
+        android:divider="@null" />
+    <TextView
+        android:id="@+id/widget_configuration"
+        style="@style/WidgetConversationTitle"
+        android:layout_below="@+id/top_line"
+        android:layout_above="@+id/bottom_line"
+        android:layout_width="match_parent"
+        android:layout_height="0dip"
+        android:layout_weight="1"
+        android:orientation="horizontal"
+        android:gravity="center_vertical"
+        android:visibility="gone"
+        android:singleLine="false"
+        android:paddingRight="20dp"
+        android:paddingLeft="20dp"
+        android:paddingBottom="20dp"
+        android:text="@string/tap_to_configure" />
+    <ImageView
+        android:id="@id/top_line"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/widget_hr"
+        android:importantForAccessibility="no"
+        android:contentDescription="@null"
+        android:layout_marginTop="-2dp"
+        android:layout_below="@id/widget_header"
+        />
+    <ImageView
+        android:id="@id/bottom_line"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/widget_hr"
+        android:importantForAccessibility="no"
+        android:contentDescription="@null"
+        android:layout_marginTop="-2dp"
+        android:layout_alignParentBottom="true"
+        />
+</RelativeLayout>