I'm currently able to build and run my game just fine using API 25, but all the documentation and and the lint tool suggest going to API 26+. When I install I get the INSTALL_FAILED_OLDER_SDK ... Requires newer sdk version #27 (current version is #25) error. It appears my device is up to date (333700.3780.0) but when I check the API version on the device(using adb shell getprop ro.build.version.sdk) it states 25. Doing this to all our devices gives the same result.
Same here, even my quest is up to the latest version of software, the getprop still gives me a API level 25. Also I had several app failed to run after deployed to the quest, because in unity player settings I gave them API levels higher than 25. I think maybe oculus is updating the OS / runtime, but not updating the ground level android it is running on?