FROMLIST: D-Bus: hs20 credentials with multiple domains

Adds the support of multiple domains for interworking credentials in
D-Bus API.

Signed-off-by: Damien Dejean <damiendejean@chromium.org>
(am from https://patchwork.ozlabs.org/patch/1661540/)

BUG=b:237981416
TEST="Run hwsim test: ./run-all.sh
tast run ${DUT} wifi.PasspointSelection.* wifi.PasspointRoaming.* \
	wifi.PasspointARCProvisioning"

Change-Id: I2dccaf5ce6f7d3d1afa120d345108238ad5aff93
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/hostap/+/3780652
Reviewed-by: Matthew Wang <matthewmwang@chromium.org>
Commit-Queue: Damien Dejean <damiendejean@google.com>
Reviewed-by: Sean Paul <sean@poorly.run>
Tested-by: Damien Dejean <damiendejean@google.com>
2 files changed