Revert "Expose getSpi from crypto operations as hidden API."

This reverts commit 050e672aaaaa8f8c57788e8d551f43c5fbffe339.

The users of public getSpi have been migrated to getCurrentSpi
introduced in 5d15925a79b8beddfafa8de2ede7fff360a386cb.

(cherry-picked from commit c52bf74f7e53b9f58bbeb29f4d248e7dba7d15ce)

Bug: 18088752
Change-Id: Ied72c8a62a49d9fba8b7bc2d3ef2e30da7daa6e4
4 files changed