Upstream: Ignore android.util.Log usage in WebAPK code
Upstream: Ignore android.util.Log usage in WebAPK code

Code in //chrome/android/webapk cannot depend on anything in Chromium including
//base.
Do not throw a PRESUMBIT error for android.util.Log usage in
//chrome/android/webapk

BUG=609122

Review-Url: https://codereview.chromium.org/1980693002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#393830}

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