DO NOT MERGE: Start Device Discovery after logical address allocation.

Usually TV initiates Device Discovery sequence after logical address
allocation of local devices. For that added new callback interface
to AddressAllocationCallback to HdmiCecDevice.
Along with this, add onAddressAllocated to HdmiLocalDevice so that
start sending local device information once logical allocation is done.

Change-Id: I4cdc5dd7770674a17a0f23c383a6c1ca221e3104