Update color of FAB

I copied Dialers fab into Contacts instead of ContactsCommon.

Since this is a visual element, there is little chance of it
diverging from Dialer in an undetected way.

I was previously overzelously trying to unify colors/icons between
dialer and contacts. This is not a good policy when others are less
zeoulos.

Bug: 16847357
Change-Id: I6e3587d5871a485963f8677e9697ee777d6f1caf
diff --git a/res/values/colors.xml b/res/values/colors.xml
index 84ecea0..2a53896 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -35,8 +35,10 @@
     <color name="primary_color_dark">#0277bd</color>
     <color name="primary_color">#0288d1</color>
 
-    <!-- Color of the selected tab underline (overriding value in ContactsCommon) -->
-    <color name="contacts_accent_color">#00acc1</color>
+    <!-- Color of the selected tab underline -->
+    <color name="contacts_accent_color">#FFFFFF</color>
+
+    <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>