Fix vkGetPhysicalDeviceQueueFamilyProperties2 struct setup

When fetching queue family properties with priority extensions the
`sType` field of the `VkQueueFamilyProperties2` struct needs to be
initialized.

Bug: 414758977
Test: run emulator with API level 36 AVDs
Flag: EXEMPT bugfix
Change-Id: I5baa3c19df3becf0a84bf2bf52e7c8ff48a8243e