Add a setting to enable/disable calling accounts.

Bug: 20303449
Change-Id: I34f9e5a572fd449ad617861576937f9648ae4ee9
diff --git a/res/values/strings.xml b/res/values/strings.xml
index a2295b5..181a7f7 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -73,6 +73,12 @@
         a text response. [CHAR LIMIT=40] -->
     <string name="respond_via_sms_confirmation_format">Message sent to <xliff:g id="phone_number">%s</xliff:g>.</string>
 
+    <!-- Title of settings screen that allows user to enable and disable phone-accounts.
+         Each method for placing a call (SIM1, SIM2, SIP account, etc) has a phone-account.
+         Phone-accounts that are created by third party apps can be disabled and enabled by user.
+         [CHAR LIMIT=30] -->
+    <string name="enable_account_preference_title">Calling accounts</string>
+
     <!-- Message indicating that the user is not allowed to make non-emergency outgoing phone calls
          due to a user restriction -->
     <string name="outgoing_call_not_allowed">Only emergency calls are allowed by the device owner.</string>