Add SavedStateHandle support to LinkPreviewViewModelV2.

app/src/main/java/org/thoughtcrime/securesms/audio/AudioHash.java

@@ -1,17 +1,22 @@
 package org.thoughtcrime.securesms.audio;
 
+import android.os.Parcel;
+import android.os.Parcelable;
+
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import org.thoughtcrime.securesms.database.model.databaseprotos.AudioWaveFormData;
+import org.thoughtcrime.securesms.util.ParcelUtil;
 import org.whispersystems.util.Base64;
 
 import java.io.IOException;
+import java.util.Objects;
 
 /**
  * An AudioHash is a compact string representation of the wave form and duration for an audio file.
  */
-public final class AudioHash {
+public final class AudioHash implements Parcelable {
 
   @NonNull private final String            hash;
   @NonNull private final AudioWaveFormData audioWaveForm;
@@ -25,6 +30,39 @@ public final class AudioHash {
     this(Base64.encodeBytes(audioWaveForm.encode()), audioWaveForm);
   }
 
+  protected AudioHash(Parcel in) {
+    hash = Objects.requireNonNull(in.readString());
+
+    try {
+      audioWaveForm = AudioWaveFormData.ADAPTER.decode(Objects.requireNonNull(ParcelUtil.readByteArray(in)));
+    } catch (IOException e) {
+      throw new AssertionError();
+    }
+  }
+
+  @Override
+  public void writeToParcel(Parcel dest, int flags) {
+    dest.writeString(hash);
+    ParcelUtil.writeByteArray(dest, audioWaveForm.encode());
+  }
+
+  @Override
+  public int describeContents() {
+    return 0;
+  }
+
+  public static final Creator<AudioHash> CREATOR = new Creator<>() {
+    @Override
+    public AudioHash createFromParcel(Parcel in) {
+      return new AudioHash(in);
+    }
+
+    @Override
+    public AudioHash[] newArray(int size) {
+      return new AudioHash[size];
+    }
+  };
+
   public static @Nullable AudioHash parseOrNull(@Nullable String hash) {
     if (hash == null) return null;
     try {