Add Pixel 6 device name.
Add Pixel 6 device name.

Change-Id: If1ccc1aa787667a29fcf79a1749bcc9c3bd2b20a
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/500476
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Joe Gregorio <b9cf2471ff6d33504cafe8e6f356b732b2cadced@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot