Remove the VisibleForTesting annotation on IaPrefixOption constructor.

Fix AndroidLint warning in aosp/2691418.

Bug: 260934173
Test: TH
Change-Id: Idfaff1342931d6c3ebfd3aa2fea02ab3ed5bb6f1
diff --git a/staticlibs/device/com/android/net/module/util/structs/IaPrefixOption.java b/staticlibs/device/com/android/net/module/util/structs/IaPrefixOption.java
index f0e4409..59d655c 100644
--- a/staticlibs/device/com/android/net/module/util/structs/IaPrefixOption.java
+++ b/staticlibs/device/com/android/net/module/util/structs/IaPrefixOption.java
@@ -18,8 +18,6 @@
 
 import static com.android.net.module.util.NetworkStackConstants.DHCP6_OPTION_IAPREFIX;
 
-import androidx.annotation.VisibleForTesting;
-
 import com.android.net.module.util.Struct;
 import com.android.net.module.util.Struct.Field;
 import com.android.net.module.util.Struct.Type;
@@ -69,7 +67,6 @@
     @Field(order = 5, type = Type.ByteArray, arraysize = 16)
     public final byte[] prefix;
 
-    @VisibleForTesting
     public IaPrefixOption(final short code, final short length, final long preferred,
             final long valid, final byte prefixLen, final byte[] prefix) {
         this.code = code;