First working version of the confirmationui HAL service

This implementation does not provide any security guaranties.
 * The input method (NotSoSecureInput) runs a crypto protocols that is
   sufficiently secure IFF the end point is implemented on a trustworthy
   secure input device. But since the endpoint is currently in the HAL
   service itself this implementation is not secure.
 * This implementation provides most of the functionality, but not the
   secure UI infrastructure required to run Android Protected
   Confirmation.

Bug: 146078942
Test: VtsHalConfirmationUIV1_0TargetTest
Change-Id: I14717b5fa4ef15db960cdd506b8c6fe5369aec8d