New translations strings.xml (Serbian (Cyrillic))

app/src/main/res/values-sr/strings.xml

@@ -1036,6 +1036,8 @@
     <string name="frequency">Frequency</string>
     <string name="toot_per_day">%s statuses per day</string>
     <string name="date_range">Date range</string>
+    <string name="action_groups">Groups</string>
+    <string name="no_messages">No groups!</string>
     <plurals name="number_of_vote">
         <item quantity="one">%d vote</item>
         <item quantity="few">%d votes</item>