518 implemented o auth token support

See merge request !53

impl goggle account setup

See merge request !52

cherry pick: Update Package name "foundation.e.accountmanager"

See merge request !51

Update submodule reference's to forked repositories.

Updated submodules:

- cert4android
- ical4android
- vcard4android

* use FragmentComponentManagers findActivity method provided by hilt (closes bitfireAT/davx5#106)

* WebCalFragment CalendarViewHolder: Pass Fragment instead of FragmentManager so that requireActivity() can be used
Co-authored-by: Ricki Hirner <hirner@bitfire.at>

* Removed update related to from JtxSyncManager

updateRelatedTo is now done implicitely in the sync content provider for every inserted or updated icalobject/relatedto

* Update ical4android
Co-authored-by: Ricki Hirner <hirner@bitfire.at>

* [WIP] initialization code to make tests non-flaky

* init code as junit rule and remove flaky annotations

* remove exception for flaky tests in Github test workflow

* ensure correct class rule execution order

* AccountSettings: handle address book accounts (fixes: address books are not synced because of IllegalArgumentException)

* Tests (not finished)

* Sync adapter: share single HttpClient between all SyncManagers (should fix bitfireAT/davx5#99)
* HttpClient: use producer for CertManager
* Call setAccountVisibility only when necessary
* Fix tests

Don't set up periodic syncs for contacts sync of the address book accounts (fixes bitfireAT/davx5#96)

* Use Hilt for DI
* Use Hilt for settings providers
* Use Hilt for login credentials fragment
* Use Hilt instead of ServiceLoader for intro fragments
* Rewrite from Koin to Hilt
* Tests
* Use more Hilt modules for service loading (account drawer, intro fragments)
* Lint
* WebDAV provider: don't listen to changes in onCreate (causes problems with Hilt and tests)

* Update images, add video URL

* Video without ab_channel