[Android] Convert the last java file in Android CHIPTool to kotlin (p…

…roject-chip#25236)

* Convert NetworkCredentialsParcelable.java to NetworkCredentialsParcelable.kt

* Address review comments

examples/android/CHIPTool/app/src/main/java/com/google/chip/chiptool/NetworkCredentialsParcelable.kt

@@ -0,0 +1,149 @@
+/*
+ *   Copyright (c) 2023 Project CHIP Authors
+ *   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.
+ *
+ */
+package com.google.chip.chiptool
+
+import android.os.Parcelable
+import android.os.Parcel
+import android.os.Parcelable.Creator
+
+/** Class for holding WiFi or Thread credentials, but not both.  */
+class NetworkCredentialsParcelable : Parcelable {
+  var wiFiCredentials: WiFiCredentials?
+    private set
+  var threadCredentials: ThreadCredentials?
+    private set
+
+  private constructor(
+    wifiCredentials: WiFiCredentials?, threadCredentials: ThreadCredentials?
+  ) {
+    this.wiFiCredentials = wifiCredentials
+    this.threadCredentials = threadCredentials
+  }
+
+  // Begin Parcelable implementation
+  private constructor(parcel: Parcel) {
+    wiFiCredentials = parcel.readParcelable(WiFiCredentials::class.java.classLoader)
+    threadCredentials = parcel.readParcelable(ThreadCredentials::class.java.classLoader)
+  }
+
+  override fun describeContents(): Int {
+    return 0
+  }
+
+  override fun writeToParcel(out: Parcel, flags: Int) {
+    out.writeParcelable(wiFiCredentials, 0)
+    out.writeParcelable(threadCredentials, 0)
+  }
+
+  class WiFiCredentials : Parcelable {
+    val ssid: String?
+    val password: String?
+
+    constructor(ssid: String?, password: String?) {
+      this.ssid = ssid
+      this.password = password
+    }
+
+    // Begin Parcelable implementation
+    private constructor(parcel: Parcel) {
+      ssid = parcel.readString()
+      password = parcel.readString()
+    }
+
+    override fun describeContents(): Int {
+      return 0
+    }
+
+    override fun writeToParcel(out: Parcel, flags: Int) {
+      out.writeString(ssid)
+      out.writeString(password)
+    }
+
+    companion object CREATOR : Parcelable.Creator<WiFiCredentials?> {
+      override fun createFromParcel(parcel: Parcel): WiFiCredentials? {
+        return WiFiCredentials(parcel)
+      }
+
+      override fun newArray(size: Int): Array<WiFiCredentials?> {
+        return arrayOfNulls(size)
+      }
+    }
+  }
+
+  class ThreadCredentials : Parcelable {
+    val operationalDataset: ByteArray
+
+    constructor(operationalDataset: ByteArray) {
+      this.operationalDataset = operationalDataset
+    }
+
+    // Begin Parcelable implementation
+    private constructor(parcel: Parcel) {
+      operationalDataset = ByteArray(parcel.readInt())
+      parcel.readByteArray(operationalDataset)
+    }
+
+    override fun describeContents(): Int {
+      return 0
+    }
+
+    override fun writeToParcel(out: Parcel, flags: Int) {
+      out.writeInt(operationalDataset.size)
+      out.writeByteArray(operationalDataset)
+    }
+
+    companion object CREATOR : Parcelable.Creator<ThreadCredentials?> {
+      override fun createFromParcel(parcel: Parcel): ThreadCredentials? {
+        return ThreadCredentials(parcel)
+      }
+
+      override fun newArray(size: Int): Array<ThreadCredentials?> {
+        return arrayOfNulls(size)
+      }
+    }
+  }
+
+  companion object {
+    /**
+     * Return a NetworkCredentialsParcelable object with the given WiFiCredentials and null
+     * ThreadCredentials.
+     */
+    fun forWiFi(wifiCredentials: WiFiCredentials?): NetworkCredentialsParcelable {
+      return NetworkCredentialsParcelable(wifiCredentials, null)
+    }
+
+    /**
+     * Return a NetworkCredentialsParcelable object with the given ThreadCredentials and null
+     * WiFiCredentials.
+     */
+    fun forThread(threadCredentials: ThreadCredentials?): NetworkCredentialsParcelable {
+      return NetworkCredentialsParcelable(null, threadCredentials)
+    }
+
+    @JvmField
+    val CREATOR = object : Parcelable.Creator<NetworkCredentialsParcelable?> {
+      override fun createFromParcel(parcel: Parcel): NetworkCredentialsParcelable? {
+        return NetworkCredentialsParcelable(parcel)
+      }
+
+      override fun newArray(size: Int): Array<NetworkCredentialsParcelable?> {
+        return arrayOfNulls(size)
+      }
+    }
+  }
+}