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[Android] Add ability to run deviceless tests on hosts without devices for perf tests.

Rationale: The resource_size test does not require a device to run. We want to be able
to run this test on the builders, which do not have devices. This CL allows for it to be
run without a device by setting the affinity to -1. We use the android test runner to run
these because of the ability to send the results to the perf dashboard.

BUG=609365

Review-Url: https://codereview.chromium.org/2200193002
Cr-Commit-Position: refs/heads/master@{#410429}