Failed to get Display Refresh Rate Values

We tried running the DisplayRefreshRate Sample on different devices, but we found that we couldn’t retrieve the DisplayRefreshRate.

Currently, we suspect that unity_openxr_android requests a fixed number (size = 4) of DisplayRefreshRates. If the device's provided DisplayRefreshRate doesn’t match the expected format, it returns false.

However, according to the [specification](https://registry.khronos.org/OpenXR/specs/1.0/man/html/xrEnumerateDisplayRefreshRatesFB.html),
xrEnumerateDisplayRefreshRatesFB should return values based on the device's capacity.

This seems to be a bug in unity_openxr_android. Could you check if this issue will be fixed in a future update?

Unity Version: 6000.0.25f1
Android XR Extensions for Unity: 0.9.0
1. We have confirmed that XRInstanceManagerApi is successfully registered.
2. XrDisplayRefreshRate_getDisplayRefreshRateInfo returns a size 4 array with all values set to 0.

Start by tracing the DisplayRefreshRate Sample through XRInstanceManagerApi and XrDisplayRefreshRate_getDisplayRefreshRateInfo in the Android XR Extensions for Unity 0.9.0 integration. Compare the returned array handling with the xrEnumerateDisplayRefreshRatesFB specification and verify it on devices with different refresh-rate capabilities. Done means the API returns the device-supported values rather than a zero-filled fixed-size result.

Written by the indexing model from the issue text.