sepolicy: Fix denials on install after data format

Change-Id: I63208b81f29a5877bfa4f59f663f1355ada33f57
releasetools: Mount system before doing FullOTA_InstallEnd commands

Change-Id: Icb9e6ff3e81ff3c1435149cc1b7899673d1ee476

Conflicts:
	releasetools.py