Add ability to copy a single recipient chip.

Fixes b/5143564 implement single chip copy

Change-Id: I598a53a60ba29b99637b2d1633b3884811938317
diff --git a/chips/res/values/strings.xml b/chips/res/values/strings.xml
index 514615c..c1acaa0 100644
--- a/chips/res/values/strings.xml
+++ b/chips/res/values/strings.xml
@@ -20,4 +20,7 @@
     <!-- Text displayed when there are remote directories not returning results.
          [CHAR LIMIT=50] -->
     <string name="chips_waiting_for_directory_result">Waiting for more contacts</string>
+    <!-- Text displayed when the user long presses on a chip to copy the recipients email address.
+         [CHAR LIMIT=200] -->
+    <string name="copy">Copy email address</string>
 </resources>