Add API to get the variant of the given Multi-Link element or element
fragment sequence.
Change-Id: I09b10c8e14e1a7e7b500116782f07d9fde7a78e1
CRs-Fixed: 3040403
Add API to find the first Multi-Link element or the start of the first
Multi-Link element fragment sequence in a given buffer containing
elements, if a Multi-Link element or element fragment sequence exists
in the given buffer.
Change-Id: I3dbd0f9053e3a1e20b47c182b5258f49b1e2c409
CRs-Fixed: 3040400