am af3e993d: Merge "Implement keymaster 1.0 get_key_characteristics method"

* commit 'af3e993d459791f77feb66756bc2ac21d46a052a':
  Implement keymaster 1.0 get_key_characteristics method
tree: 73a635740a5db944bd6cecb020f386c328a1eb77
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/