arc: Add uuid to PowerHost & Send its interface version

This CL annotates an UUID to the Mojo interface `mojom::PowerHost` which
is needed to identify it when communicating with the ARC side.

This CL adds an `InterfaceVersion` object to the data sent to the ARC
side during initialization. By sending the interface version in advance,
we can reduce a `QueryVersion` call from the ARC side.
Along with this change, we need to fix `InterfaceVersion::operator<` to
make it `constexpr`, since we use `std::sort` in a `constexpr` region.

Bug: b:366321053
Change-Id: Ic574c7444fa82ad47ef59ff025909cdb56ee1b41
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5856988
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Reviewed-by: Eriko Kurimoto <elkurin@chromium.org>
Commit-Queue: Soshun Naito <soshun@google.com>
Cr-Commit-Position: refs/heads/main@{#1359143}