Fix some strings not being translated

Fixes #1318

play-services-core/src/main/res/navigation/nav_settings.xml

@@ -62,7 +62,7 @@
     <fragment
         android:id="@+id/gcmAllAppsFragment"
         android:name="org.microg.gms.ui.PushNotificationAllAppsFragment"
-        android:label="Apps using push notifications">
+        android:label="@string/prefcat_push_apps_title">
         <action
             android:id="@+id/openGcmAppDetailsFromAll"
             app:destination="@id/gcmAppFragment" />

play-services-core/src/main/res/xml/preferences_push_notifications.xml

@@ -27,7 +27,7 @@
         <Preference
             android:key="pref_push_status"
             android:selectable="false"
-            android:title="Status"
+            android:title="@string/pref_info_status"
             tools:summary="Connected since 15 minutes ago" />
     </PreferenceCategory>
     <PreferenceCategory android:layout="@layout/preference_category_no_label">