Invalidate Skia shader cache if Vulkan driver has changed

Test: Ran apps several time and observed shader cache validation
Change-Id: I7c2620b9a0eefcb7acedc86647ecf44805518b2f
diff --git a/libs/hwui/renderthread/VulkanManager.cpp b/libs/hwui/renderthread/VulkanManager.cpp
index b8ebf3b..35729c1 100644
--- a/libs/hwui/renderthread/VulkanManager.cpp
+++ b/libs/hwui/renderthread/VulkanManager.cpp
@@ -170,6 +170,7 @@
     VkPhysicalDeviceProperties physDeviceProperties;
     mGetPhysicalDeviceProperties(mPhysicalDevice, &physDeviceProperties);
     LOG_ALWAYS_FATAL_IF(physDeviceProperties.apiVersion < VK_MAKE_VERSION(1, 1, 0));
+    mDriverVersion = physDeviceProperties.driverVersion;
 
     // query to get the initial queue props size
     uint32_t queueCount;