1. Update [synctools icsx5-update branch](https://github.com/bitfireAT/synctools/pull/169) to https://github.com/bitfireAT/synctools/pull/23 2. Reference new synctools version 3. Make any necessary changes (similar to https://github.com/bitfireAT/davx5-ose/pull/1552 )
LocalCalendar: don't subclassAndroidCalendardavx5-ose#1552 )