[devicelab] add regular old blur benchmark #123879
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zanderso
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[devicelab] add regular old blur benchmark
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Currently the Impeller/engine team is leaning fairly heavily on the existing devicelab test backdrop_filter_perf_ios__timeline_summary. However, this test exhibits quite unnatural usage of the backdrop filter and does not generalize well.
Specifically this creates multiple small backdropfilters, leading to impeller creating about 400 command buffers per frame. Typical usage would be a single large backdropfilter.
This new test places an animating blur backdrop filter over a simple UI so that we can better evaluate the performance of blur at various sigma.