LockSettings: fix the get password issue during boot up

Use the lock setting service info from ILockSettings class
instead of LockSettingsService classs to get the stored
password the stored passed during bootup. Also check whether
called process has cryptkeeper or Admin permissions to get
the password.

Change-Id: I5970168853f1e4cca876f6ae767b0702368663b3
3 files changed