Remove import of libcore NonNull annotation

Remove import of libcore NonNull annotation and replace
with the standard platform one.

Bug: 113148576
Test: build
Change-Id: Ic427eb583cd4f9a83d9cf68ff22f8625a5bbdb55
diff --git a/tests/wifitests/src/com/android/server/wifi/SupplicantStaIfaceHalTest.java b/tests/wifitests/src/com/android/server/wifi/SupplicantStaIfaceHalTest.java
index eded7fc..b5ca09c 100644
--- a/tests/wifitests/src/com/android/server/wifi/SupplicantStaIfaceHalTest.java
+++ b/tests/wifitests/src/com/android/server/wifi/SupplicantStaIfaceHalTest.java
@@ -25,6 +25,7 @@
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.*;
 
+import android.annotation.NonNull;
 import android.app.test.MockAnswerUtil;
 import android.content.Context;
 import android.hardware.wifi.supplicant.V1_0.ISupplicant;
@@ -54,8 +55,6 @@
 import com.android.server.wifi.hotspot2.WnmData;
 import com.android.server.wifi.util.NativeUtil;
 
-import libcore.util.NonNull;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.mockito.ArgumentCaptor;