Pressed state for buttons

- Delete button, expansion button, fix padding on messaging icon

Bug: 4382255
Change-Id: I5ef0a9ee760a095b4f9e0efda71c13c4b89328e6
diff --git a/res/layout/edit_delete_button.xml b/res/layout/edit_delete_button.xml
index c0a895e..790163e 100644
--- a/res/layout/edit_delete_button.xml
+++ b/res/layout/edit_delete_button.xml
@@ -21,7 +21,7 @@
     android:layout_width="wrap_content"
     android:layout_height="@dimen/editor_min_line_item_height"
     android:layout_gravity="top">
-    <ImageButton
+    <ImageView
         android:id="@+id/delete_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"