Split up main engine from methods

We need to add more methods to the keystore engine, so split out RSA so
it doesn't become too unwieldy.

This doesn't affect the size of the symbol table since the default
visibility for this module is "hidden."

Change-Id: I806553a8d1a01ff0ffd7b67054932ddf783bb502
4 files changed
tree: fb03171113041c44612abc39b00c8b3d5e4a0aae
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/