Fix build breakage by adding color to contacts common.

The correct color resource was in Dialer but not in ContactsCommon.
Adding to ContactsCommon.

Bug: 18204058
Change-Id: I4ff3ce07177bb94d4070da1b67030ddbc4204c44
diff --git a/res-common/values/colors.xml b/res-common/values/colors.xml
index 1da07fb..e12634a 100644
--- a/res-common/values/colors.xml
+++ b/res-common/values/colors.xml
@@ -46,6 +46,9 @@
     <!-- Color of image view placeholder. -->
     <color name="image_placeholder">#DDDDDD</color>
 
+    <!-- Primary text color in the Phone app -->
+    <color name="dialtacts_primary_text_color">#333333</color>
+
     <!-- Secondary text color in the Phone app -->
     <color name="dialtacts_secondary_text_color">#737373</color>