Revert "Revert "vndservicemanager: remove static dependency on libselinux""

This reverts commit 53625afa.

The build errors introduced in original topic has now been fixed in
libselinux

Bug: 37343404
Bug: 37919668
Test: Build and boot.

Change-Id: I2c1baac221c9516ac9d3ef5317af19839c8f9af3
Signed-off-by: Sandeep Patil <sspatil@google.com>