Update phone account settings string, for consistency.

Bug: 16788935
Change-Id: Ifb30a04ebdb39b4ed51d4fee95d0b7be146a192f
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 981c131..8f4a2e8 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -77,7 +77,7 @@
     <string name="respond_via_sms_confirmation_format">Message sent to <xliff:g id="phone_number">%s</xliff:g>.</string>
 
     <!-- Title for phone accounts settings screen -->
-    <string name="phone_account_preferences_title">Phone account preferences</string>
+    <string name="phone_account_preferences_title">Phone account settings</string>
 
     <!-- Title for setting to select default outgoing phone account -->
     <string name="default_outgoing_account_title">Default outgoing account</string>