Physical device was using the wrong allocations scope.

Tests: dEQP-VK.wsi.xlib.surface.create_custom_allocator
Tests: dEQP-VK.wsi.xlib.surface.create_simulate_oom
Bug: b/132451407
Change-Id: I242d97548bdf01cbdab5cc708469bca02a845a66
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/31691
Presubmit-Ready: Ben Clayton <bclayton@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
Tested-by: Hernan Liatis <hliatis@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>