android: allow FW to verify public key

FW-side implementation:
go/akq/c/overlays/qcom-lanai15-incoming/abl/tianocore/edk2/+/2184633

Test: pineapple booted
Bug: 337846185
Bug: 374684404
Change-Id: If179d916307ec11c9ee2fd860657dbaadc1e149a
Signed-off-by: Dmitrii Merkurev <dimorinny@google.com>