Add all swap commands to USB_PD_CONTROL host command: data,
power, and vconn swap.
BUG=none
BRANCH=smaug
TEST=tested on both samus and ryu while connected to each other.
Change-Id: I280a0da2d3c5a5436243134ab3f2ec353ebf6ab8
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/299290
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>