Fix new job timezone awareness

Author: AlexVelezLl

src/android_app_plugin/kolibri_plugin.py

@@ -1,5 +1,6 @@
 import logging
 from datetime import datetime
+from django.utils import timezone
 
 from jnius import autoclass
 from kolibri.core.tasks.hooks import StorageHook
@@ -30,7 +31,7 @@ def schedule(
         if orm_job.id:
 
             delay = (
-                max(0, (orm_job.scheduled_time - datetime.now()).total_seconds())
+                max(0, (orm_job.scheduled_time - timezone.now()).total_seconds())
                 if orm_job.scheduled_time
                 else 0
             )