Import dedicated allocs w/ importDedicatedMemory

Import dedicated allocs w/ importDedicatedMemory

When exported memory was a dedicated allocation,
the memory must be imported also as dedicated allocation.
This was already implemented for images,
this change does it for buffers, too.

Affects:
dEQP-VK.api.external.memory.opaque_fd.dedicated.device_only.import_twice
dEQP-VK.api.external.memory.opaque_fd.dedicated.device_only.import_multiple_times
dEQP-VK.api.external.memory.opaque_fd.dedicated.device_only.dup
dEQP-VK.api.external.memory.opaque_fd.dedicated.device_only.dup2
dEQP-VK.api.external.memory.opaque_fd.dedicated.device_only.dup3
dEQP-VK.api.external.memory.opaque_fd.dedicated.device_only.send_over_socket
dEQP-VK.api.external.memory.opaque_fd.dedicated.buffer.bind_export_import_bind
dEQP-VK.api.external.memory.opaque_fd.dedicated.buffer.export_bind_import_bind
dEQP-VK.api.external.memory.opaque_fd.dedicated.buffer.export_import_bind_bind

Components: Vulkan

VK-GL-CTS issue: 1422
Change-Id: I782aeb256151dd98cc6a91b8a6942cd916d3f7b7