Revise keymint_tags.h

* replace NullOr with std::optional.
* Add mising tag.
* Undefine helper macros so that keymint_tags.h can be used together
  with keymaster_tags.h
* Check if KeyParameterValue variant matches KeyParameterTag in
  accessors.

Test: VtsAidlKeyMintTargetTest
Change-Id: I6c951071f30fd27c8c21a2e8cc86f421a3bc37d9