keystore: Add flag for blobs to be unencrypted

In order to let apps use keystore more productively, make the blob
encryption optional. As more hardware-assisted keystores (i.e., hardware
that has a Keymaster HAL) come around, encrypting blobs start to make
less sense since the thing it's encrypting is usually a token and not
any raw key material.

Bug: 8122243
Change-Id: I7d70122beb32b59f06a923ade93234393b75a2cd
5 files changed
tree: a2b8c589f6356f839c42867e2e81a6f8f2023873
  1. keystore/
  2. keystore-engine/
  3. softkeymaster/