[Payments] Update some editor titles to reflect missing information

components/payments_strings.grdp

Index: components/payments_strings.grdp
diff --git a/components/payments_strings.grdp b/components/payments_strings.grdp
index a9ad6a2119dfbcd7932fb316fcd9301b19d71f8c..a88e2fb57cbbd8918442b5c598ff66ed7f6711d8 100644
--- a/components/payments_strings.grdp
+++ b/components/payments_strings.grdp
@@ -97,6 +97,9 @@
   <message name="IDS_PAYMENTS_ADD_ADDRESS" desc="Text on a button that lets a user add new address." formatter_data="android_java">
     Add address
   </message>
+  <message name="IDS_PAYMENTS_EDIT_ADDRESS" desc="Text on a button that lets a user edit an existing address.">

[anthonyvd, 2017/04/25 12:39:33]

Is there nothing like this on Android already?

[Mathieu, 2017/04/25 12:54:46]

There is IDS_AUTOFILL_EDIT_PROFILE and ADD_PROFILE but now that I think of it, I
would prefer all Payments strings to be centralized here (right now it's kind of
half/half. I've made a cleanup pass and found some dupe strings in the process. 

+    Edit address
+  </message>
   <message name="IDS_PAYMENTS_CHECKING_OPTION" desc="Text explaining that the option the user selected is being checked and verified." formatter_data="android_java">
     Checking
   </message>