Create AP_RCProtocol_SFML #35421

Job	Run time
build (base)	4m 50s
build (clang)	6m 23s
build-gcc-heli	4m 53s
autotest-heli (sitltest-heli)	9m 55s
autotest (sitltest-copter-tests1a)	10m 0s
autotest (sitltest-copter-tests1b)	11m 42s
autotest (sitltest-copter-tests1c)	11m 6s
autotest (sitltest-copter-tests1d)	10m 37s
autotest (sitltest-copter-tests1e)	11m 48s
autotest (sitltest-copter-tests2a)	11m 34s
autotest (sitltest-copter-tests2b)	22m 59s
	1h 55m 47s

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