This is a substantial update to the OpenXR specification. The OpenXR
loader in this release supports both OpenXR 1.0 and 1.1, and sample
applications such as hello_xr continue to only require OpenXR 1.0. The
schema associated with the xr.xml description of OpenXR has received a
small but breaking change, so software that parses it may need an update
accordingly. Additionally, the protocol for the OpenXR loader on Android
to communicate with system or installable runtime brokers has been
extended for improvfed backward- and forward-compatibility; see the
changes to the loader design document for more information.

-   Registry
    -   New ratified Khronos extension: XR_KHR_locate_spaces (internal
        MR 2272, internal issue 1706)
    -   New ratified Khronos extension: XR_KHR_maintenance1 (internal MR
        3053)
    -   New ratified OpenXR version: XR_VERSION_1_1 - OpenXR 1.1.
        (internal MR 3053)
    -   New multi-vendor extension: XR_EXT_future (internal MR 2610)
    -   New vendor extension: XR_META_environment_depth (internal MR
        2771, internal MR 3271)
    -   Mark XR_OCULUS_android_session_state_enable as deprecated.
        (internal MR 3255)
    -   Update the XML schema to change how dependencies are described
        (replacing requiresCore and requires attributes of extension,
        and feature and extension attributes of require, with a new
        depends attribute.). This is a breaking change of the XML
        schema, though in an infrequently processed attribute. This
        corresponds to the change made in Vulkan 1.3.241. (internal MR
        3260)
-   SDK
    -   API dump layer: Handle opaque futures defined by XR_EXT_future.
        (internal MR 2610)
    -   API dump layer: Zero initialize out-param in calls to
        xrResultToString and xrStructureTypeToString. (internal MR 3284)
    -   Android loader: Build using NDK 23.2. (internal MR 2992)
    -   Android loader: Allow the loader to check multiple records from
        the broker, for backward- and forward-compatibility (internal MR
        3269, internal issue 2226)
    -   Loader: Improve error logging in the case that the Windows
        registry ActiveRuntime path cannot be parsed or found. (internal
        MR 3015, internal issue 2125)
    -   Loader: Remove path separator parsing from Windows registry
        ActiveRuntime path to fix bug. (internal MR 3015)
    -   Loader: Fix build issue for ARMv6 architectures, and note
        architecture naming quirk of Raspberry Pi OS in the architecture
        table in the loader documentation. (OpenXR-SDK-Source PR 464,
        OpenXR-SDK-Source issue 463)
    -   Reduce duplication of environment variable getters and setters.
        (internal MR 3039)
    -   Updates to scripts and software to handle aliases and promoted
        functionality in XR_KHR_maintenance1 and XR_VERSION_1_1
        (internal MR 3053)
    -   hello_xr: Fix Windows mirror window acquire, wait, present loop.
        (internal MR 3289)
    -   hello_xr and other samples: Update Android compile SDK version
        (to 33), NDK version (to 23.2), and build tools version (to
        34.0.0). (internal MR 2992)
    -   hello_xr and runtime list: Request an OpenXR 1.0 instance by
        default. (internal MR 3320)
    -   loader_test: Build fixes to allow loader_test to compile / run
        on Android. (internal MR 3153)

GitOrigin-RevId: 5f8d07b310234c348624ff10252df784aa7908ad