Fix missing resource file in webrtc_perf_tests.isolate
Fix missing resource file in webrtc_perf_tests.isolate

In https://codereview.webrtc.org/2074043002/ the Chromium test framework
for Android started cleaning up resources between runs to prevent old
resources file polluting test runs. This surfaced that one file was missing
in the webrtc_perf_tests.isolate list.

TBR=henrik.lundin@webrtc.org
NOTRY=True

Review-Url: https://codereview.webrtc.org/2077823002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#13180}

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