Change drmserver SELinuxDomainTest condition.

drmserver is not necessarily present on all android devices, but if it is,
there should be only one domain running in that context.

Bug: 18369871
Change-Id: Id346cb86a253880bb725f05a235b2595899282f6
diff --git a/tests/tests/security/src/android/security/cts/SELinuxDomainTest.java b/tests/tests/security/src/android/security/cts/SELinuxDomainTest.java
index ee1b027..66054f9 100644
--- a/tests/tests/security/src/android/security/cts/SELinuxDomainTest.java
+++ b/tests/tests/security/src/android/security/cts/SELinuxDomainTest.java
@@ -199,7 +199,7 @@
 
     /* drm server is always present */
     public void testDrmServerDomain() throws FileNotFoundException {
-        assertDomainOne("u:r:drmserver:s0", "/system/bin/drmserver");
+        assertDomainZeroOrOne("u:r:drmserver:s0", "/system/bin/drmserver");
     }
 
     /* Media server is always running */