Added sync

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

@@ -2051,6 +2051,12 @@ public class Helper {
 
     // Files
 
+    static {
+        System.loadLibrary("fairemail");
+    }
+
+    public static native void sync();
+
     static String sanitizeFilename(String name) {
         if (name == null)
             return null;

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

@@ -109,8 +109,10 @@ public class WorkerFts extends Worker {
 
             markIndexed(db, ids);
 
-            if (checkpoints)
+            if (checkpoints) {
                 DB.checkpoint(context);
+                Helper.sync();
+            }
 
             Log.i("FTS indexed=" + indexed);
             return Result.success();