Check schedule on scheduling next poll

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

@@ -1604,7 +1604,7 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
         ServiceUI.schedule(context, enabled);
     }
 
-    private static long[] getSchedule(Context context) {
+    static long[] getSchedule(Context context) {
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         if (!prefs.getBoolean("schedule", false))
             return null;

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

@@ -459,10 +459,14 @@ public class ServiceUI extends IntentService {
             db.endTransaction();
         }
 
-        if (reschedule)
-            schedule(this, true);
-
         ServiceSynchronize.eval(this, "poll");
+
+        if (reschedule) {
+            long now = new Date().getTime();
+            long[] schedule = ServiceSynchronize.getSchedule(this);
+            boolean enabled = (schedule == null || (now >= schedule[0] && now < schedule[1]));
+            schedule(this, enabled);
+        }
     }
 
     private void onBanner() {