Create selinux_policy_* for /product and /system_ext

Separate selinux_policy_system_ext and selinux_policy_product from
the selinux_policy_nonsystem module. With this CL,
selinux_policy_nonsystem will include the files for /vendor and /odm
partitions only. It will still include selinux_policy_system_ext and
selinux_policy_product as required modules.

Bug: 170282998
Test: build and check boot
Change-Id: Ie2f646a217ec86ede95caec101622bc530d12cfc
1 file changed