Revert "Replace the native scrypt in SyntheticPasswordManager by"

This reverts commit 20f2f24d7bee098f0094ba1c6efb4935df7fa1c0.

Reason for revert: nativeSidFromPasswordHandle is still needed

Change-Id: I02b39d8373f2e9f286d2b5f36a7fed719cbf08ef
4 files changed