Improved UI description for "Subscribe:" field

* Changed to "Toggle Push Notifications" to better match the in-app messages toggle.

Author: jkasten2

Examples/OneSignalDemo/app/src/main/res/values/strings.xml

@@ -37,7 +37,7 @@
 
     <string name="settings">Settings</string>
     <string name="subscribe_colon">Subscribe:</string>
-    <string name="app_settings_notifications_description">Check app notification settings</string>
+    <string name="app_settings_notifications_description">Toggle Push Notifications</string>
     <string name="pause_in_app_messages_colon">Pause In-App Messages:</string>
     <string name="app_settings_pause_in_app_messages_description">Toggle in-app messages</string>