Expose getMetrics() in ExoV1 and ExoV2 FrameworkMediaDrm classes.

PiperOrigin-RevId: 278054214

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

@@ -16,6 +16,7 @@
 package com.google.android.exoplayer2.drm;
 
 import android.media.MediaDrmException;
+import android.os.PersistableBundle;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
 import com.google.android.exoplayer2.util.Util;
@@ -105,6 +106,12 @@ public final class DummyExoMediaDrm<T extends ExoMediaCrypto> implements ExoMedi
   }
 
   @Override
+  @Nullable
+  public PersistableBundle getMetrics() {
+    return null;
+  }
+
+  @Override
   public String getPropertyString(String propertyName) {
     return "";
   }

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

@@ -21,6 +21,7 @@ import android.media.MediaDrm;
 import android.media.MediaDrmException;
 import android.media.NotProvisionedException;
 import android.os.Handler;
+import android.os.PersistableBundle;
 import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.drm.DrmInitData.SchemeData;
 import java.util.HashMap;
@@ -288,6 +289,14 @@ public interface ExoMediaDrm<T extends ExoMediaCrypto> {
   void restoreKeys(byte[] sessionId, byte[] keySetId);
 
   /**
+   * Returns drm metrics. May be null if unavailable.
+   *
+   * @see MediaDrm#getMetrics()
+   */
+  @Nullable
+  PersistableBundle getMetrics();
+
+  /**
    * @see MediaDrm#getPropertyString(String)
    */
   String getPropertyString(String propertyName);

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

@@ -23,6 +23,7 @@ import android.media.MediaDrm;
 import android.media.MediaDrmException;
 import android.media.NotProvisionedException;
 import android.media.UnsupportedSchemeException;
+import android.os.PersistableBundle;
 import android.text.TextUtils;
 import androidx.annotation.Nullable;
 import androidx.annotation.RequiresApi;
@@ -226,6 +227,16 @@ public final class FrameworkMediaDrm implements ExoMediaDrm<FrameworkMediaCrypto
   }
 
   @Override
+  @Nullable
+  @TargetApi(28)
+  public PersistableBundle getMetrics() {
+    if (Util.SDK_INT < 28) {
+      return null;
+    }
+    return mediaDrm.getMetrics();
+  }
+
+  @Override
   public String getPropertyString(String propertyName) {
     return mediaDrm.getPropertyString(propertyName);
   }