Drop the Android SwiftShader Vulkan skips in tst_qcrhiplumbing

The rows skipped for QTBUG-146930 never failed because of
SwiftShader. Emulator 36.6.11 (and older) aligned host
visible Vulkan memory to a hard coded 4 KB page while the
guest driver on the x86_64 16 KB page size image used
getpagesize(), so every upload and readback could land up
to 12 KB off. Emulator 37.1.11 ships the gfxstream fix,
and CI moves to it with the matching qt5 provisioning change.

Remove the 10 Vulkan skips together with the now unused
isAndroidSwiftShader helper.

Task-number: QTBUG-136620
Task-number: QTBUG-146930
Pick-to: 6.12
Change-Id: I7ecbe2032477fba90d80454b97e89753a6a1b25c
Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io>