Project Treble is Google's plan to keep the drivers working - I don't know how well that's going seeing that OEMs were given the option to not support it at the time it was launched.
For a good example of this, see the conclusion of this recent Project Zero writeup of an Android bug (related to old kernel versions in Android, in fact): https://googleprojectzero.blogspot.com/2019/11/bad-binder-an... First, Google Project Zero determined on their own that they would approach Google Android with a 7-day disclosure timeline because of active exploitation - usually a disclosure timeline is a way to force the hand of a software vendor you don't control. Second, their suggestion for fixing it is for Android to change how they approach kernel updates.
For another good example, see the time that Google Ads penalized Google Chrome for buying paid links. https://searchengineland.com/google-chromes-paid-link-penalt...