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This CL does a few things:
* Adds the icon for each device type.
* Adds ability to send a tab after the user selects a device.
* Enables the bottom controller when the feature is enabled.
* Adds the last active time to the device picker.
* Formatting of the device picker list.

Bug: 949223
Change-Id: Ic2d691a68f0fb7e55a375ee932b07633e5c644e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1633330Reviewed-by: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Reviewed-by: sebsg <sebsg@chromium.org>
Commit-Queue: Tanya Gupta <tgupta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664573}