Address feedback

Author: grendello

src/native/libs/System.Security.Cryptography.Native.Android/pal_trust_manager.c

@@ -1,3 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
 #include "pal_trust_manager.h"
 
 ARGS_NON_NULL_ALL void AndroidCryptoNative_RegisterRemoteCertificateValidationCallback(RemoteCertificateValidationCallback callback)

src/native/libs/System.Security.Cryptography.Native.Android/pal_trust_manager.h

@@ -1,3 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
 #include "pal_jni.h"
 
 typedef bool (*RemoteCertificateValidationCallback)(intptr_t);

src/native/libs/System.Security.Cryptography.Native.Android/pal_trust_manager_jni_export.c

@@ -1,3 +1,6 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
 #include "pal_trust_manager.h"
 #include <stdatomic.h>