Reduce logging

app/src/main/java/eu/faircode/email/DB.java

@@ -137,6 +137,7 @@ public abstract class DB extends RoomDatabase {
                     EntityLog.TABLE_NAME) {
                 @Override
                 public void onInvalidated(@NonNull Set<String> tables) {
+                    if (BuildConfig.DEBUG)
                         Log.i("ROOM invalidated=" + TextUtils.join(",", tables));
                 }
             });