Adding license blurb to code

lib/src/main/java/com/segment/analytics/kotlin/destinations/nielsendcr/NielsenDCRDestination.kt

@@ -1,3 +1,26 @@
+//
+// MIT License
+//
+// Copyright (c) 2023 Segment
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
 package com.segment.analytics.kotlin.destinations.nielsendcr
 
 import android.content.Context
@@ -678,4 +701,4 @@ internal data class NielsenDCRSettings(
 
 private fun JsonObject.asStringMap(): Map<String, String> = this.mapValues { (_, value) ->
     value.toContent().toString()
-}
+}