Handle Vulkan related timers in TimeGraph. (#1649)
Handle Vulkan related timers in TimeGraph. (#1649)

This adds support to the new Vulkan related timer types (command
buffers and debug markers) to `TimeGraph`, which will forward them
to the `GpuTrack` that already has support for those (#1642).

Test: Compile -- Not really testable without producing the timers.
Bug: http://b/176809754
google/orbit,google/orbit,google/orbit,google/orbit