Does Google manually review all app updates for Android Auto?
I am working on an update to make my already published App compatible with Android Auto. As I read in Google design Guidelines this update has to be approved by Google to then be available for distribution.
https://developer.android.com/docs/quality-guidelines/auto-app-quality
But does this mean that every update I publish from this date on needs to be manually reviewed and approved by Google, even if it doesn't change anything on the Android Auto integration of this app? Or is it just the initial update?
No it's all updates.
Note that if the submitted app is an update to an existing app and your updated app does not meet the review criteria, the update is rejected and the existing app remains published in the Google Play store.
You can read more about the Android Auto distrubution here
