tree e0c199cf77e02a90db89d7d6309178cf48d686f6
parent 5d33c4652a54aea53029b16db3d4cc4e632f841a
author Tianjie <xunchang@google.com> 1608058411 -0800
committer Tianjie <xunchang@google.com> 1610508298 -0800

Wrap the escrow data with key from keystore

Factor out a class to handle the aes encrypted blob, and
further encrypt the reboot escrow data with a local key
from key store.

Bug: 172780686
Test: atest FrameworksServicesTests:RebootEscrowDataTest \
            FrameworksServicesTests:LockSettingsServiceTests \
            FrameworksServicesTests:RecoverySystemServiceTest \
            FrameworksServicesTests:RebootEscrowManagerTests ;
      atest CtsAppSecurityHostTestCases:ResumeOnRebootHostTest
Change-Id: Id0e18bef4d3b194a254fa1755cd17a43a7b6e5bc