[metrics] Use unicode box-drawing chars and goo.gl link instead
[metrics] Use unicode box-drawing chars and goo.gl link instead

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┃      METRICS COLLECTION IS TAKING PLACE           ┃
┃                                                   ┃
┃ To suppress this message opt in or out using:     ┃
┃ $ gclient metrics [--opt-in] [--opt-out]          ┃
┃ For more information please see metrics.README.md ┃
┃ in your depot_tools checkout or visit             ┃
┃ https://goo.gl/yNpRDV.                            ┃
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R=ehmaldonado, mmoss, tandrii

Change-Id: Iab3a5a18aa57e603c8f253f3fcbbf7f96727e003
Reviewed-on: https://chromium-review.googlesource.com/c/1368409
Reviewed-by: Edward Lesmes <d05609f027dc667cc37492b1dc1bdea5d60fa82a@chromium.org>
Commit-Queue: Elliott Friedman <222440d37d5da142d011249bf7daf8fb6b62f747@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools