Re-add READ_SMS permission to SMS plugin

Previously was bugged: If the SMS plugin was enabled but the Telephony was not, the SMS plugin would not have worked. Good thing nobody noticed! :)

src/org/kde/kdeconnect/Plugins/SMSPlugin/SMSPlugin.java

@@ -430,6 +430,9 @@ public class SMSPlugin extends Plugin {
 
     @Override
     public String[] getRequiredPermissions() {
-        return new String[]{Manifest.permission.SEND_SMS};
+        return new String[]{
+                Manifest.permission.SEND_SMS,
+                Manifest.permission.READ_SMS,
+        };
     }
 }