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Added if guard before using submission_trace_id() and embed_trace_id() method of LocalSurfaceId in trace events to ensure that the LocalSurfaceId is valid when they are called.

Bug: 931792
Change-Id: I6cd64feb7b94d84dcd2b4df2d558cf5c8fc904a1
Reviewed-on: https://chromium-review.googlesource.com/c/1478931Reviewed-by: Saman Sami <samans@chromium.org>
Commit-Queue: Edwin Joe <ejoe@google.com>
Cr-Commit-Position: refs/heads/master@{#633832}