Add HIDL backend to keystore service am: 657356c169
am: 86050dcfc6

Change-Id: I6e927be5e4ccf54399cfd9ceaf5257fd4ac2c221
tree: 7c83ecb665d2f4a7a8946d2bf99e6e6b8221dbfe
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/
  4. MODULE_LICENSE_APACHE2
  5. NOTICE