Log classifier size

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

@@ -521,6 +521,7 @@ public class Log {
                         event.addMetadata("extra", "memory_available", getAvailableMb());
                         event.addMetadata("extra", "native_allocated", Debug.getNativeHeapAllocatedSize() / 1024L / 1024L);
                         event.addMetadata("extra", "native_size", Debug.getNativeHeapSize() / 1024L / 1024L);
+                        event.addMetadata("extra", "classifier_size", MessageClassifier.getSize(context));
 
                         Boolean ignoringOptimizations = Helper.isIgnoringOptimizations(context);
                         event.addMetadata("extra", "optimizing", (ignoringOptimizations != null && !ignoringOptimizations));

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

@@ -758,6 +758,11 @@ public class MessageClassifier {
                 backup ? "classifier.backup" : "classifier.json");
     }
 
+    static long getSize(Context context) {
+        File file = getFile(context, false);
+        return (file.exists() ? file.length() : -1L);
+    }
+
     private static class State {
         private final List<String> words = new ArrayList<>();
         private final Map<String, Stat> classStats = new HashMap<>();