Add ro.vendor.build.version.sdk to build_vendor_prop

At b/160209547, it is needed to read
ro.vendor.build.version.sdk prop to determine
whether skipping test or not based on vendor
image's release version. But
ro.vendor.build.version.sdk is not added to
property_contexts and failed to read that prop in
tests. So, added ro.vendor.build.version.sdk to
property_contexts for checking vendor image's
release version in test.

Bug: 160209547
Test: m selinux_policy
Change-Id: I86bcfa632de61c5805e42aea3a1f232ae4ad080e
(cherry picked from commit 65cecec142df8b3d6594f5c4dc72e6fc2d9e35a5)
1 file changed