Re-enable media telemetry tests on windows 7 device.
Re-enable media telemetry tests on windows 7 device.

Here's a passing run for the test: https://build.chromium.org/p/tryserver.chromium.perf/builders/win_x64_perf_bisect/builds/1225

BUG=555079
CQ_EXTRA_TRYBOTS=

Review-Url: https://codereview.chromium.org/1973393002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#393606}

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