anv: Clamp apiVersion to 1.0.0 on Android <= Oreo

Android Pie accepts Vulkan 1.1. But the Nougat and Oreo CTS reject
Vulkan 1.1 in test
android.graphics.cts.VulkanFeaturesTest#testVulkanHardwareFeatures.

See <https://b.corp.google.com/issues/136215923>.
1 file changed