Restores pre-PR157 custom fixes to SoftwareOperation: - CTR block mode in cipher algorithm mapping - isAead guard on CipherPrimitive.updateAad (non-GCM throws INVALID_TAG) - Reflection-based error code resolution for cross-HAL compatibility - Granular exception mapping (SignatureException, BadPaddingException, etc.) - latencyFloorMs constructor parameter with LockSupport.parkNanos in finish()