tpm_manager: Change location for owner password data

This CL adds functionality to allow TpmManager to save its local data
in /var/lib/tpm_manager rather than in /mnt/stateful_partition.
This CL also modifies the upstart script for TpmManager to create
the required files and set their permissions.

Bug: 24059577
TEST=ownership flow on DUT

Change-Id: I876c25b74c4791c73aff6e474ee0992a4ad9d423
4 files changed