Support the setting of file security contexts in OTA and update packages.

Pass the file_contexts configuration to the releasetools scripts
so that the security contexts of files can be properly set for OTA
and update packages.

Requires Ica5fb73d6f2ffb981b74d1896538988dbc4d9b24

Change-Id: I5a63fd61a7e74d386d0803946d06bcf2fa8a857e
4 files changed