Add DecryptionResource to FormatHolder

PiperOrigin-RevId: 243243975

library/core/src/main/java/com/google/android/exoplayer2/FormatHolder.java

@@ -16,12 +16,24 @@
 package com.google.android.exoplayer2;
 
 import androidx.annotation.Nullable;
+import com.google.android.exoplayer2.drm.DecryptionResource;
 
 /**
  * Holds a {@link Format}.
  */
 public final class FormatHolder {
 
+  /**
+   * Whether the object expected to populate {@link #format} is also expected to populate {@link
+   * #decryptionResource}.
+   */
+  // TODO: Remove once all Renderers and MediaSources have migrated to the new DRM model [Internal
+  // ref: b/129764794].
+  public boolean decryptionResourceIsProvided;
+
+  /** An accompanying context for decrypting samples in the format. */
+  @Nullable public DecryptionResource<?> decryptionResource;
+
   /** The held {@link Format}. */
-  public @Nullable Format format;
+  @Nullable public Format format;
 }