BIMI: added unverified logging

app/src/extra/java/eu/faircode/email/Bimi.java

@@ -366,6 +366,9 @@ public class Bimi {
             }
         }
 
+        if (bitmap != null && !verified)
+            Log.i("BIMI unverified");
+
         return (bitmap == null ? null : new Pair<>(bitmap, verified));
     }