Add ExoMediaDrm.OnExpirationUpdateListener

Which mirrors MediaDrm.OnExpirationUpdateListener.

PiperOrigin-RevId: 298826713

library/core/src/main/java/com/google/android/exoplayer2/drm/DummyExoMediaDrm.java

@@ -44,6 +44,11 @@ public final class DummyExoMediaDrm<T extends ExoMediaCrypto> implements ExoMedi
     // Do nothing.
   }
 
+  @Override
+  public void setOnExpirationUpdateListener(OnExpirationUpdateListener<? super T> listener) {
+    // Do nothing.
+  }
+
   @Override
   public byte[] openSession() throws MediaDrmException {
     throw new MediaDrmException("Attempting to open a session using a dummy ExoMediaDrm.");

library/core/src/main/java/com/google/android/exoplayer2/drm/ExoMediaDrm.java

@@ -149,6 +149,23 @@ public interface ExoMediaDrm<T extends ExoMediaCrypto> {
         boolean hasNewUsableKey);
   }
 
+  /** @see android.media.MediaDrm.OnExpirationUpdateListener */
+  interface OnExpirationUpdateListener<T extends ExoMediaCrypto> {
+
+    /**
+     * Called when a session expiration update occurs, to inform the app about the change in
+     * expiration time
+     *
+     * @param mediaDrm The {@link ExoMediaDrm} object on which the event occurred.
+     * @param sessionId The DRM session ID on which the event occurred
+     * @param expirationTimeMs The new expiration time for the keys in the session. The time is in
+     *     milliseconds, relative to the Unix epoch. A time of 0 indicates that the keys never
+     *     expire.
+     */
+    void onExpirationUpdate(
+        ExoMediaDrm<? extends T> mediaDrm, byte[] sessionId, long expirationTimeMs);
+  }
+
   /** @see android.media.MediaDrm.KeyStatus */
   final class KeyStatus {
 
@@ -222,9 +239,10 @@ public interface ExoMediaDrm<T extends ExoMediaCrypto> {
    */
   void setOnKeyStatusChangeListener(OnKeyStatusChangeListener<? super T> listener);
 
-  /**
-   * @see MediaDrm#openSession()
-   */
+  /** @see MediaDrm#setOnExpirationUpdateListener(MediaDrm.OnExpirationUpdateListener, Handler) */
+  void setOnExpirationUpdateListener(OnExpirationUpdateListener<? super T> listener);
+
+  /** @see MediaDrm#openSession() */
   byte[] openSession() throws MediaDrmException;
 
   /**

library/core/src/main/java/com/google/android/exoplayer2/drm/FrameworkMediaDrm.java

@@ -107,7 +107,7 @@ public final class FrameworkMediaDrm implements ExoMediaDrm<FrameworkMediaCrypto
 
   @Override
   public void setOnEventListener(
-      final ExoMediaDrm.OnEventListener<? super FrameworkMediaCrypto> listener) {
+      ExoMediaDrm.OnEventListener<? super FrameworkMediaCrypto> listener) {
     mediaDrm.setOnEventListener(
         listener == null
             ? null
@@ -117,7 +117,7 @@ public final class FrameworkMediaDrm implements ExoMediaDrm<FrameworkMediaCrypto
 
   @Override
   public void setOnKeyStatusChangeListener(
-      final ExoMediaDrm.OnKeyStatusChangeListener<? super FrameworkMediaCrypto> listener) {
+      ExoMediaDrm.OnKeyStatusChangeListener<? super FrameworkMediaCrypto> listener) {
     if (Util.SDK_INT < 23) {
       throw new UnsupportedOperationException();
     }
@@ -133,7 +133,23 @@ public final class FrameworkMediaDrm implements ExoMediaDrm<FrameworkMediaCrypto
               listener.onKeyStatusChange(
                   FrameworkMediaDrm.this, sessionId, exoKeyInfo, hasNewUsableKey);
             },
-        null);
+        /* handler= */ null);
+  }
+
+  @Override
+  public void setOnExpirationUpdateListener(
+      OnExpirationUpdateListener<? super FrameworkMediaCrypto> listener) {
+    if (Util.SDK_INT < 23) {
+      throw new UnsupportedOperationException();
+    }
+
+    mediaDrm.setOnExpirationUpdateListener(
+        listener == null
+            ? null
+            : (mediaDrm, sessionId, expirationTimeMs) -> {
+              listener.onExpirationUpdate(FrameworkMediaDrm.this, sessionId, expirationTimeMs);
+            },
+        /* handler= */ null);
   }
 
   @Override