Even though we don't plan to be launchable, we need to include an
icon for plumbing reasons.  For now I'm using a temporary
icon pulled from our Cubey sample.  When we get something official
we can easily swap it in, and enhance it support multiple dpis.

Bug: angleproject:2991
Change-Id: I2873d74586543c617cfc13fe6582b0b4967cbb22
Reviewed-on: https://chromium-review.googlesource.com/c/1355505Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Tim Van Patten <timvp@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Cody Northrop <cnorthrop@google.com>