Is there any plans to support Google oauth integration for use with caldav?
No, Google is the only service with OAuth I know and at the moments, there are no plans in DAVx⁵ to add and maintain OAuth just for Google.
See also: https://davdroid.bitfire.at/configuration/google/
Ok my mistake I found the URL listed online, I don’t have that URL off the top of my head…
SORRY I’ll go back and redo it with only that davx URL… My bad…
The current Google API / OAuth method is not supported by DAVdroid but it’s still possible by using the old format as mentioned by @daniu :
Yet it requires the compromise Allow less secure apps: ON in the Google security settings.
However, delegates don’t sync.
Tested on OnePlus 3t, Android 7.1.1, DAVdroid 220.127.116.11.