Small tweaks to improve messaging/conversation appearance.

Bug: 185593456
Test: manual, visual

Change-Id: I7275175e5baee554cace86fe9a2553d8052ac5e6
diff --git a/core/res/res/layout/notification_template_material_messaging.xml b/core/res/res/layout/notification_template_material_messaging.xml
index 3564f97..eb61ea4 100644
--- a/core/res/res/layout/notification_template_material_messaging.xml
+++ b/core/res/res/layout/notification_template_material_messaging.xml
@@ -199,13 +199,11 @@
             android:id="@+id/notification_action_list_margin_target"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_marginTop="-20dp"
             android:clipChildren="false"
             android:orientation="vertical">
         <include layout="@layout/notification_template_smart_reply_container"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginTop="@dimen/notification_content_margin"
                 android:layout_marginStart="@dimen/notification_content_margin_start"
                 android:layout_marginEnd="@dimen/notification_content_margin_end" />
         <include layout="@layout/notification_material_action_list" />
diff --git a/core/res/res/values/dimens.xml b/core/res/res/values/dimens.xml
index 538c121..639d9e7 100644
--- a/core/res/res/values/dimens.xml
+++ b/core/res/res/values/dimens.xml
@@ -809,8 +809,8 @@
     <!-- The top padding of the conversation icon container when the avatar is small-->
     <dimen name="conversation_icon_container_top_padding_small_avatar">8dp</dimen>
 
-    <!-- The padding of the conversation header when expanded. This is calculated from the expand button size + notification_content_margin_end -->
-    <dimen name="conversation_header_expanded_padding_end">38dp</dimen>
+    <!-- The padding of the conversation header when expanded. This is calculated from the expand button size (56dp) - notification_content_margin_end (16dp) -->
+    <dimen name="conversation_header_expanded_padding_end">40dp</dimen>
 
     <!-- extra padding at the start of the icons when not conversations to keep them horizontally aligned with the notification icon -->
     <dimen name="messaging_layout_icon_padding_start">4dp</dimen>