Remove ATAP code

The ATAP code depends on libatap in the system/iot/attestation
repository which was removed from AOSP. Remove the ATAP code
from Keymaster as well in order to break the dependency.

Bug: 285203365
Test: Presubmit
Change-Id: I2218cbe2a24bb460d6937faadb2620a641b77f16
11 files changed