Automatically clear old download log entries on upgrade (#6370)

storage/database/src/main/java/de/danoeh/antennapod/storage/database/PodDBAdapter.java

@@ -1477,6 +1477,9 @@ public class PodDBAdapter {
         public void onUpgrade(final SQLiteDatabase db, final int oldVersion, final int newVersion) {
             Log.w("DBAdapter", "Upgrading from version " + oldVersion + " to " + newVersion + ".");
             DBUpgrader.upgrade(db, oldVersion, newVersion);
+
+            db.execSQL("DELETE FROM " + PodDBAdapter.TABLE_NAME_DOWNLOAD_LOG + " WHERE "
+                    + PodDBAdapter.KEY_COMPLETION_DATE + "<" + (System.currentTimeMillis() - 7L * 24L * 3600L * 1000L));
         }
     }
 }