Allow reading hypervisor capabilities

System server needs to do this to know whether a suitable VM for
CompOS can be created. System server does not need the ability to
actually start a VM, so we don't grant that.

Bug: 218276733
Test: Presubmits
Change-Id: Ibb198ad55819aa924f1bfde68ce5b22c89dca088
diff --git a/private/system_server.te b/private/system_server.te
index f70744d..1e79932 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -787,6 +787,9 @@
 # Read the net.464xlat.cellular.enabled property (written by init).
 get_prop(system_server, net_464xlat_fromvendor_prop)
 
+# Read hypervisor capabilities ro.boot.hypervisor.*
+get_prop(system_server, hypervisor_prop)
+
 # Create a socket for connections from debuggerd.
 allow system_server system_ndebug_socket:sock_file create_file_perms;