Revert "Renames sepolicy files from nonplat_* to vendor_*"

This reverts commit 38c404c6.
Reason for revert: broke mac build

b/70273082

FAILED: out/target/product/generic_x86/obj/ETC/vendor_sepolicy.cil_intermediates/vendor_sepolicy.cil
/bin/bash -c "(out/host/darwin-x86/bin/version_policy -b out/target/product/generic_x86/obj/FAKE/selinux_policy_intermediates/plat_pub_policy.cil -t out/target/product/generic_x86/obj/ETC/vendor_sepolicy.cil_intermediates/vendor_policy_raw.cil -n 10000.0 -o out/target/product/generic_x86/obj/ETC/vendor_sepolicy.cil_intermediates/vendor_sepolicy.cil.tmp ) && (grep -Fxv -f out/target/product/generic_x86/obj/ETC/plat_pub_versioned.cil_intermediates/plat_pub_versioned.cil out/target/product/generic_x86/obj/ETC/vendor_sepolicy.cil_intermediates/vendor_sepolicy.cil.tmp > out/target/product/generic_x86/obj/ETC/vendor_sepolicy.cil_intermediates/vendor_sepolicy.cil ) && (out/host/darwin-x86/bin/secilc -m -M true -G -N -c 30 		out/target/product/generic_x86/obj/ETC/plat_sepolicy.cil_intermediates/plat_sepolicy.cil out/target/product/generic_x86/obj/ETC/plat_pub_versioned.cil_intermediates/plat_pub_versioned.cil out/target/product/generic_x86/obj/ETC/10000.0.cil_intermediates/10000.0.cil out/target/product/generic_x86/obj/ETC/vendor_sepolicy.cil_intermediates/vendor_sepolicy.cil -o /dev/null -f /dev/null )"
Parsing out/target/product/generic_x86/obj/FAKE/selinux_policy_intermediates/plat_pub_policy.cil
Parsing out/target/product/generic_x86/obj/ETC/vendor_sepolicy.cil_intermediates/vendor_policy_raw.cil
grep: out of memory

Change-Id: I5b043fc6b5939456184ffb296cd00b3943a899f9