Fixed MB specification for Android Debug (Nexus 9).
Fixed MB specification for Android Debug (Nexus 9).

This bot changed waterfalls.

BUG=490984

Review URL: https://codereview.chromium.org/1911523004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#388665}

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