Change Vulkan API to 1.3

The commit changes the platform code to support Vulkan 1.3.

Bug: 191881132
Test: build
Change-Id: I75ed8a0737ef20ff95e4a27ce39cc855d8a1deeb
diff --git a/vulkan/nulldrv/null_driver.cpp b/vulkan/nulldrv/null_driver.cpp
index a9f37e5..eea0ec9 100644
--- a/vulkan/nulldrv/null_driver.cpp
+++ b/vulkan/nulldrv/null_driver.cpp
@@ -260,7 +260,7 @@
 
 VKAPI_ATTR
 VkResult EnumerateInstanceVersion(uint32_t* pApiVersion) {
-    *pApiVersion = VK_API_VERSION_1_2;
+    *pApiVersion = VK_API_VERSION_1_3;
     return VK_SUCCESS;
 }