Fix vsync and offscreen for restricted_trace_perf * Updated the command used to run the trace so it would use the mode input, which includes --vsync and --offscreen. Bug: angleproject:8234 Change-Id: Ia761e369993183dcdfb66383f3006cf660044add Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4641272 Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.com>