Do no send <Feature Abort> as response of <Feature Abort>

Cec service replies <Feature Abort> back to original device
if incoming message is not handled by any of feature action or device.
It's applied to <Feature Abort> message itself, but it can cause
weird sideeffect of it.
This change just ignore <Feature Abort> even though it's not handled
by any of local device or feature actions.

Bug: 16359564
Change-Id: I925e89ca4db49a637dd296447c04eee1ba679c6b