Add cellular modem (wwan) support #1273

Job	Run time
check-trigger	3s
unit-test / Build infix x86_64_minimal	1m 39s
build-arm	0s
build-x86_64	0s
build-aarch64	0s
test-run-x86_64	0s
test-publish-x86_64	0s
	1m 42s

Provide feedback