Collapse extra raw contact editors

There are now two different header styles
1) When creating a new raw contact: if there are multiple
 accounts to create the raw contact under, then show a
 header with an acconut selector
2) Otherwise, show a visually distinct account header without
 a drop down account selector. If there are multiple raw
 contacts, this header also lets you collapse raw contacts

Typical users, who only have a single writeable account, will
never see header (1). This is fortunate, since switching between
the two header styles is a bit visually inconsistent.

Bug: 18004959
Change-Id: I133a7355a220f20b55657a6c1a51ff44665ea3b9
diff --git a/res/values/colors.xml b/res/values/colors.xml
index daea14b..d9ac84a 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -37,8 +37,8 @@
 
     <color name="floating_action_button_icon_color">@color/contacts_accent_color</color>
 
-    <!-- Color of the separator between entries in an ExpandingEntryCardView -->
-    <color name="expanding_entry_card_item_separator_color">#e4e4e4</color>
+    <!-- Horizontal separator line should be 12% dark in the light theme. -->
+    <color name="divider_line_color_light">#e0e0e0</color>
 
     <!-- Color of the text on an ExpandingEntryCard button -->
     <color name="expanding_entry_card_button_text_color">@android:color/black</color>