Implement keymaster_get_device_info.

This change provides the implementation within keymaster to allow other
TAs to retrieve the device information needed to implement an
IRemotelyProvisionedComponent HAL interface.

Bug: 255823262
Test: keymaster_test.c
Change-Id: Ia413ad34db2f8ffe5d42f6816a24303fa23a14b5
6 files changed