This is a reland of 5cf7472d

The ShareGroupVk::mResourceUseLists was not being cleared each call to
RendererVk::submitFrame(), so it was growing indefinitely. Each
vk::ResourceUseList within it was cleared, so it was holding an
essentially "infinite" list of empty lists, but that caused the loop in
RendererVk::submitFrame() to take more and more time until the tests
timed out.

The fix is to do 'resourceUseLists.clear()' once the loop to release all
resources has completed, like releaseResourceUsesAndUpdateSerials() does
for each individual list.   Additionally, ASSERTs are added to guarantee
that the lists are empty when the ContextVk and ShareGroupVk are
destroyed.

Original change's description:
> Vulkan: Ignore glFlush to reduce vkQueueSubmits in Asphalt 9
>
> Multithreaded apps can use the following pattern:
>
>   glDrawElements()
>   glFenceSync()
>   glFlush()
>   glWaitSync()
>
> This currently results in a vkQueueSubmit for every glFlush() to ensure
> that the work has landed in the command queue in the correct order.
> However, ANGLE can instead avoid the vkQueueSubmit during the glFlush()
> in this situation by instead flushing the ContextVk's commands and
> ending the render pass to ensure the commands are submitted in the
> correct order to the renderer. This improves performance for Asphalt 9
> by reducing frame times from 150-200msec to 35-55msec.
>
> Specifically, ANGLE will call flushCommandsAndEndRenderPass() when
> there is a sync object pending a flush or if the ContextVk is currently
> shared.
>
> Additionally, on all devices except Qualcomm, ANGLE can ignore all other
> glFlush() calls entirely and return immediately. For Qualcomm devices,
> ANGLE is still required to perform a full flush (resulting in a
> vkQueueSubmit), since ignoring the glFlush() reduces the Manhattan 3.0
> offscreen score by ~3%.
>
> Bug: angleproject:5306
> Bug: angleproject:5425
> Change-Id: I9d747caf5bf306166be0fec630a78caf41208c27
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2552718
> Commit-Queue: Tim Van Patten <timvp@google.com>
> Reviewed-by: Charlie Lao <cclao@google.com>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>

Bug: angleproject:5306
Bug: angleproject:5425
Bug: angleproject:5470
Change-Id: I14ee424d032f22e5285d67accbec078ad1955dd0
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2595811
Commit-Queue: Tim Van Patten <timvp@google.com>
Reviewed-by: Charlie Lao <cclao@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>