Restores pre-PR157 custom hardening that was lost during the reset:
- StrongBox capability check (RSA<=2048, EC=P256)
- StrongBox keygen latency floor (250ms) and op latency floor (80ms)
- StrongBox concurrent op limit (4 ops in 10s sliding window)
- MAX_ALIAS_LENGTH (256KB) binder buffer guard in handleGenerateKey
Real StrongBox hardware has these constraints. Without simulation,
detectors identify the software shim by its unrealistic performance.