Implemented PR feedback

packages/camera/camera/android/src/main/java/io/flutter/plugins/camera/features/flash/FlashMode.java

@@ -17,6 +17,15 @@ public enum FlashMode {
     this.strValue = strValue;
   }
 
+  /**
+   * Tries to convert the supplied string into a {@see FlashMode} enum value.
+   *
+   * <p>When the supplied string doesn't match a valid {@see FlashMode} enum value, null is
+   * returned.
+   *
+   * @param modeStr String value to convert into an {@see FlashMode} enum value.
+   * @return Matching {@see FlashMode} enum value, or null if no match is found.
+   */
   public static FlashMode getValueForString(String modeStr) {
     for (FlashMode value : values()) {
       if (value.strValue.equals(modeStr)) return value;

packages/camera/camera/android/src/main/java/io/flutter/plugins/camera/features/noisereduction/NoiseReductionFeature.java

@@ -1,4 +1,4 @@
-// Copyright 2019 The Chromium Authors. All rights reserved.
+// Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -35,6 +35,11 @@ public class NoiseReductionFeature extends CameraFeature<NoiseReductionMode> {
     }
   }
 
+  /**
+   * Creates a new instance of the {@link NoiseReductionFeature}.
+   *
+   * @param cameraProperties Collection of the characteristics for the current camera device.
+   */
   public NoiseReductionFeature(CameraProperties cameraProperties) {
     super(cameraProperties);
   }

packages/camera/camera/android/src/main/java/io/flutter/plugins/camera/features/noisereduction/NoiseReductionMode.java

@@ -1,4 +1,4 @@
-// Copyright 2019 The Chromium Authors. All rights reserved.
+// Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -18,6 +18,15 @@ public enum NoiseReductionMode {
     this.strValue = strValue;
   }
 
+  /**
+   * Tries to convert the supplied string into a {@see NoiseReductionMode} enum value.
+   *
+   * <p>When the supplied string doesn't match a valid {@see NoiseReductionMode} enum value, null is
+   * returned.
+   *
+   * @param modeStr String value to convert into an {@see NoiseReductionMode} enum value.
+   * @return Matching {@see NoiseReductionMode} enum value, or null if no match is found.
+   */
   public static NoiseReductionMode getValueForString(String modeStr) {
     for (NoiseReductionMode value : values()) {
       if (value.strValue.equals(modeStr)) return value;

packages/camera/camera/android/src/test/java/io/flutter/plugins/camera/features/noisereduction/NoiseReductionFeatureTest.java

@@ -1,4 +1,4 @@
-// Copyright 2019 The Chromium Authors. All rights reserved.
+// Copyright 2013 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.