Fix Vulkan subgroup size control crash by targeting Vulkan 1.3 core

[SS-JIA]

Summary

Fixes a native Vulkan compute pipeline creation crash (-3 VK_ERROR_INITIALIZATION_FAILED) on Android 16 (API 36) drivers.

VK_EXT_subgroup_size_control was promoted to core in Vulkan 1.3, so those drivers no longer advertise it as a separate device extension. ExecuTorch requested a Vulkan 1.1 instance, where the feature is neither core nor available as an extension — yet the physical device still reports it as supported via vkGetPhysicalDeviceFeatures2. Chaining VkPhysicalDeviceSubgroupSizeControlFeaturesEXT into VkDeviceCreateInfo.pNext without a valid enable route is invalid usage and crashes device/pipeline creation.

This is a fuller fix than simply disabling the feature (cf. #20762): it keeps subgroup size control working on modern devices by using the core route.

Approach

• Raise the requested instance apiVersion to Vulkan 1.3, capped at the loader-supported version and falling back to 1.1 on loaders that predate vkEnumerateInstanceVersion (select_instance_api_version() in Device.cpp). This never fails on a 1.1+ loader and does not drop older devices — the instance version is a ceiling, not a floor.
• Gate subgroup size control per device in create_logical_device: enable it only when the extension is enabled, or when both the instance and the physical device are at 1.3+. Otherwise clear the related capability flags so downstream shader dispatch does not request an unsupported subgroup size.
• Drop the const_cast (take a mutable PhysicalDevice&) and add the missing #include <cstring>.

The pipeline code and feature-detection code need no changes: the ...EXT structs/enums they already use are aliases of the core Vulkan 1.3 types.

Suggested review order

1. Device.cpp / Device.h — the loader-safe select_instance_api_version() helper.
2. Runtime.cpp — instance apiVersion now uses that helper.
3. Adapter.cpp — per-device extension-or-core gating in create_logical_device.

Test Plan

• Export and run a Vulkan-delegated model on an Android 16 (API 36) device; confirm compute pipelines create successfully and subgroup size control is used via the core path.
• Verify on a Vulkan 1.1 device that the feature falls back cleanly without crashing.

Fixes #11754.

Authored with Claude.

🤖 Generated with Claude Code

cc @manuelcandales @digantdesai @cbilgin

[pytorch-bot]

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