feat: iOS implementation

android/src/main/java/com/visioncamerabase64/BitmapUtils.java

@@ -1,5 +1,21 @@
 package com.visioncamerabase64;
 
+/*
+ * Copyright 2020 Google LLC. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 import android.annotation.TargetApi;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;