Create Svc::ComInterface from Svc::ComStub

[LeStarch]

F´ Version
Affected Component

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Feature Description

Make an interface out of the ComStub protocol. See #2255 for an example interface change set.

The following three ports should be pulled out of Svc::ComStub into Svc/Interfaces/ComInterface.fppi such that implementers of the Com pattern may quickly implement new Com drop-ins.

fprime/Svc/ComStub/ComStub.fpp

Lines 9 to 16 in a73bff2

	@ Data coming in from the framing component
	sync input port comDataIn: Drv.ByteStreamSend
	@ Status of the last radio transmission
	output port comStatus: Fw.SuccessCondition
	@ Com data passing back out
	output port comDataOut: Drv.ByteStreamRecv