Remove EcIesParameterSpec until it's needed.

This class was added in Android M to enable us to expose ECIES. ECIES
is not going to happen in Android M. I'm thus removing this unused
class until such time when it's needed.

Bug: 18088752
Change-Id: I16ab1bbd0b4334419c9a8f29d64661c150aa8d32
3 files changed