Move BundleableUtil in common

It is used to implement `Bundleable` for
`TrackSelection`.

PiperOrigin-RevId: 383408386

library/common/src/main/java/com/google/android/exoplayer2/util/BundleableUtils.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * 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.android.exoplayer2.util;
+
+import android.os.Bundle;
+import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.Bundleable;
+import com.google.common.collect.ImmutableList;
+import java.util.ArrayList;
+import java.util.List;
+
+/** Utilities for {@link Bundleable}. */
+public final class BundleableUtils {
+
+  /**
+   * Converts a {@link Bundleable} to a {@link Bundle}. It's a convenience wrapper of {@link
+   * Bundleable#toBundle} that can take nullable values.
+   */
+  @Nullable
+  public static Bundle toNullableBundle(@Nullable Bundleable bundleable) {
+    return bundleable == null ? null : bundleable.toBundle();
+  }
+
+  /**
+   * Converts a {@link Bundle} to a {@link Bundleable}. It's a convenience wrapper of {@link
+   * Bundleable.Creator#fromBundle} that can take nullable values.
+   */
+  @Nullable
+  public static <T extends Bundleable> T fromNullableBundle(
+      Bundleable.Creator<T> creator, @Nullable Bundle bundle) {
+    return bundle == null ? null : creator.fromBundle(bundle);
+  }
+
+  /**
+   * Converts a {@link Bundle} to a {@link Bundleable}. It's a convenience wrapper of {@link
+   * Bundleable.Creator#fromBundle} that provides default value to ensure non-null.
+   */
+  public static <T extends Bundleable> T fromNullableBundle(
+      Bundleable.Creator<T> creator, @Nullable Bundle bundle, T defaultValue) {
+    return bundle == null ? defaultValue : creator.fromBundle(bundle);
+  }
+
+  /** Converts a list of {@link Bundleable} to a list {@link Bundle}. */
+  public static <T extends Bundleable> ImmutableList<Bundle> toBundleList(List<T> bundleableList) {
+    ImmutableList.Builder<Bundle> builder = ImmutableList.builder();
+    for (int i = 0; i < bundleableList.size(); i++) {
+      Bundleable bundleable = bundleableList.get(i);
+      builder.add(bundleable.toBundle());
+    }
+    return builder.build();
+  }
+
+  /** Converts a list of {@link Bundle} to a list of {@link Bundleable}. */
+  public static <T extends Bundleable> ImmutableList<T> fromBundleList(
+      Bundleable.Creator<T> creator, List<Bundle> bundleList) {
+    ImmutableList.Builder<T> builder = ImmutableList.builder();
+    for (int i = 0; i < bundleList.size(); i++) {
+      Bundle bundle = bundleList.get(i);
+      T bundleable = creator.fromBundle(bundle);
+      builder.add(bundleable);
+    }
+    return builder.build();
+  }
+
+  /**
+   * Converts a list of {@link Bundleable} to an {@link ArrayList} of {@link Bundle} so that the
+   * returned list can be put to {@link Bundle} using {@link Bundle#putParcelableArrayList}
+   * conveniently.
+   */
+  public static <T extends Bundleable> ArrayList<Bundle> toBundleArrayList(List<T> bundleableList) {
+    ArrayList<Bundle> arrayList = new ArrayList<>(bundleableList.size());
+    for (int i = 0; i < bundleableList.size(); i++) {
+      arrayList.add(bundleableList.get(i).toBundle());
+    }
+    return arrayList;
+  }
+
+  private BundleableUtils() {}
+}