Back then, telemetry_perf_unittest was removed from linux_android_rel_ng because it occasionally get stuck while fetching dependent files from GS.
Two things have changed since then:
1) linux_android_rel_ng is swarmed, which mean we don't run telemetry_perf_unittest in multi-process mode.
2) Dependent telemetry files are prefetched during "gclient sync" (crbug.com/780967)

This CL reenables telemetry_perf_unittest on linux_android_rel_ng to get coverage on Nexus5 devices.

Bug: 725516
Change-Id: Ib5ff018be5d702c3d60ee3a09cf5fdfb36b605d5
Reviewed-on: https://chromium-review.googlesource.com/764570


Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#516075}