[RESTRICT AUTOMERGE:] Fix malformed JUnit test class

SeparateProfileChallengeTest does not mark its test cases with @Test
annotation which causes class initialization error.

Bug: 161965398
Test: cts-tradefed run cts -m CtsDevicePolicyManagerTestCases

Change-Id: I3967dbd134af76e1f7fd754763392fb2c5603d14
diff --git a/hostsidetests/devicepolicy/src/com/android/cts/devicepolicy/SeparateProfileChallengeTest.java b/hostsidetests/devicepolicy/src/com/android/cts/devicepolicy/SeparateProfileChallengeTest.java
index 13bc5528..b3983b6 100644
--- a/hostsidetests/devicepolicy/src/com/android/cts/devicepolicy/SeparateProfileChallengeTest.java
+++ b/hostsidetests/devicepolicy/src/com/android/cts/devicepolicy/SeparateProfileChallengeTest.java
@@ -16,9 +16,12 @@
 
 package com.android.cts.devicepolicy;
 
-import com.android.tradefed.device.DeviceNotAvailableException;
 import android.platform.test.annotations.SecurityTest;
 
+import org.junit.Test;
+
+import com.android.tradefed.device.DeviceNotAvailableException;
+
 /**
  * Host side tests for separate profile challenge permissions.
  * Run the CtsSeparateProfileChallengeApp device side test.
@@ -46,6 +49,7 @@
     }
 
     @SecurityTest
+    @Test
     public void testSeparateProfileChallengePermissions() throws Exception {
         if (!mHasFeature || !mSupportsMultiUser) {
             return;