cryptohome: send ClearStoredOwnerPassword to tpm_manager for tpm2

For TPM 2.0, the passwords are stored by the tpm_manager, which
expects a command when it's safe to clear the owner password
(provided the dependencies has been removed). Send this command
when cryptohome received TpmClearStoredPassword.

CQ-DEPEND=CL:441159
BUG=chrome-os-partner:62689
TEST=On unowned tpm, boot, login.
     Check "tpm_manager_client status". The owner password
     should be cleared.

Change-Id: I426a0985aaa42862d175245b40f6ef10a38673e1
Reviewed-on: https://chromium-review.googlesource.com/439774
Commit-Ready: Andrey Pronin <apronin@chromium.org>
Tested-by: Andrey Pronin <apronin@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
(cherry picked from commit f2940f738a66cefe7e475f965981961c0ef45573)
Reviewed-on: https://chromium-review.googlesource.com/441369
Commit-Queue: Andrey Pronin <apronin@chromium.org>
10 files changed