Add String Resources for SIP Settings

Add string resources for the defaults of the Username, Password, and
Server in the SIP Settings screen to allow for proper translations
instead of sharing one string resource.

Bug: 29104341
Change-Id: If1063c24dd3194c757a77d2644c43a5e0fd45e61
diff --git a/sip/res/xml/sip_edit.xml b/sip/res/xml/sip_edit.xml
index 15e5ce1..58a8a92 100644
--- a/sip/res/xml/sip_edit.xml
+++ b/sip/res/xml/sip_edit.xml
@@ -22,7 +22,7 @@
         android:key="@string/username"
         android:title="@string/username_title"
         android:dialogTitle="@string/username_title"
-        android:summary="@string/default_preference_summary"
+        android:summary="@string/default_preference_summary_username"
         android:persistent="false"
         android:singleLine="true"
         android:inputType="textNoSuggestions"/>
@@ -32,7 +32,7 @@
         android:title="@string/password_title"
         android:dialogTitle="@string/password_title"
         android:password="true"
-        android:summary="@string/default_preference_summary"
+        android:summary="@string/default_preference_summary_password"
         android:persistent="false"
         android:singleLine="true"/>
 
@@ -40,7 +40,7 @@
         android:key="@string/domain_address"
         android:title="@string/domain_address_title"
         android:dialogTitle="@string/domain_address_title"
-        android:summary="@string/default_preference_summary"
+        android:summary="@string/default_preference_summary_domain_address"
         android:persistent="false"
         android:singleLine="true"
         android:inputType="textNoSuggestions"/>