v3dv: Enable sync_fd exporting on Android

It was disabled on Linux to skip sync_fd CTS tests, which is using
late vkEvent signalling which causes deadlock / dEQP timeout on v3dv.

The extension is required by vk_common_QueueSignalReleaseImageANDROID.
It's also requred by CDD for Vulkan 1.1

Closes: mesa/mesa#6977
Fixed: 316728a5 ("v3dv: Switch to the common submit framework")
Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>