Simple migration to common

Migrate all classes that are simple to move to
common.

#player-to-common

PiperOrigin-RevId: 345412080

library/core/src/main/java/com/google/android/exoplayer2/device/DeviceListener.java → library/common/src/main/java/com/google/android/exoplayer2/device/DeviceListener.java

@@ -15,9 +15,8 @@
  */
  */
 package com.google.android.exoplayer2.device;
 package com.google.android.exoplayer2.device;
 
 
-import com.google.android.exoplayer2.Player;
-
-/** A listener for changes of {@link Player.DeviceComponent}. */
+// TODO(b/172315872) change back to @link after player migration to common.
+/** A listener for changes of {@code Player.DeviceComponent}. */
 public interface DeviceListener {
 public interface DeviceListener {
 
 
   /** Called when the device information changes. */
   /** Called when the device information changes. */

library/core/src/main/java/com/google/android/exoplayer2/util/StableApiCandidate.java

-/*
- * Copyright (C) 2019 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 static java.lang.annotation.ElementType.CONSTRUCTOR;
-import static java.lang.annotation.ElementType.FIELD;
-import static java.lang.annotation.ElementType.METHOD;
-import static java.lang.annotation.ElementType.PACKAGE;
-import static java.lang.annotation.ElementType.TYPE;
-import static java.lang.annotation.RetentionPolicy.CLASS;
-
-import java.lang.annotation.Retention;
-import java.lang.annotation.Target;
-
-/**
- * Annotation to mark an API as a candidate for being part of a stable subset of the API.
- *
- * <p>Note: this is experimental, and no guarantees are made about the stability of APIs even if
- * they are marked with this annotation.
- */
-@Retention(CLASS)
-@Target({TYPE, METHOD, CONSTRUCTOR, FIELD, PACKAGE})
-public @interface StableApiCandidate {}