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- SharedClipboard sender names are embedded in SharingMessage or
  determined in SharedClipboardMessageHandler
- SharingService::GetDeviceByGuid now changes client_name returned
- sender_guid is no longer embeded in AckMessage as it's only used for
  sending acks
- Removed dependency of LocalDeviceInfoProvider in SharingFCMSender,
  instead sender_device_info is passed in and constructed by
  SharingService with updated client_name

Bug: 1013565
Change-Id: If901fe96ba140b804a87fcd8d2565512d76fa167
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865318Reviewed-by: Richard Knoll <knollr@chromium.org>
Reviewed-by: Michael van Ouwerkerk <mvanouwerkerk@chromium.org>
Commit-Queue: Alex Chau <alexchau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706941}