Run ROOM queries/transaction at foreground priority

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

@@ -92,7 +92,7 @@ public abstract class DB extends RoomDatabase {
     public abstract DaoLog log();
 
     private static DB sInstance;
-    private static ExecutorService executor = Executors.newCachedThreadPool(Helper.backgroundThreadFactory);
+    private static ExecutorService executor = Executors.newCachedThreadPool(Helper.foregroundThreadFactory);
 
     private static final String DB_NAME = "fairemail";
 

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

@@ -105,12 +105,23 @@ public class Helper {
         @Override
         public Thread newThread(@NonNull Runnable runnable) {
             Thread thread = new Thread(runnable);
-            thread.setName("FairEmail_" + threadId.getAndIncrement());
+            thread.setName("FairEmail_bg_" + threadId.getAndIncrement());
             thread.setPriority(THREAD_PRIORITY_BACKGROUND);
             return thread;
         }
     };
 
+    static ThreadFactory foregroundThreadFactory = new ThreadFactory() {
+        private final AtomicInteger threadId = new AtomicInteger();
+
+        @Override
+        public Thread newThread(@NonNull Runnable runnable) {
+            Thread thread = new Thread(runnable);
+            thread.setName("FairEmail_fg_" + threadId.getAndIncrement());
+            return thread;
+        }
+    };
+
     // Features
 
     static boolean hasPermission(Context context, String name) {