Revert "Support Speck encryption."

This reverts commit 49c27c5cb2c48ce4665affe2b3086077c768a9ae.

Remove the Speck encryption support. It was eventually
decided not to allow Speck in Android P, so this code
is no longer needed and wasn't used outside of testing.

Bug: 112009351
Test: Confirmed AES continues to work with FBE.
Change-Id: Ia5458143be5687fff8d541d8fa2c8ee24a369da4
(cherry picked from commit 270e90f033dd412206697e3a27aee76c24038c33)
1 file changed