Keystore 2.0: Implement convertStorageKeyToEphemeral() in security_level.rs

Introduce and implement convertStorageKeyToEphemeral() in
IKeystoreSecurityLevel. The function first checks for the associated
permission before routing the call to
IKeyMintDevice::convertStorageKeyToEphemeral()

Bug: 181806377
Bug: 181910578
Change-Id: I19212b1870f0e19a7125d6144fe43e23fc35d1c5
2 files changed