Use cronet for DRM requests in the main demo app

This ensures that both content and licenses are requested using the
same HTTP stack.

#minor-release

PiperOrigin-RevId: 445378940

demos/main/src/main/java/com/google/android/exoplayer2/demo/PlayerActivity.java

@@ -37,6 +37,7 @@ import com.google.android.exoplayer2.Player;
 import com.google.android.exoplayer2.RenderersFactory;
 import com.google.android.exoplayer2.Tracks;
 import com.google.android.exoplayer2.audio.AudioAttributes;
+import com.google.android.exoplayer2.drm.DefaultDrmSessionManagerProvider;
 import com.google.android.exoplayer2.drm.FrameworkMediaDrm;
 import com.google.android.exoplayer2.ext.ima.ImaAdsLoader;
 import com.google.android.exoplayer2.ext.ima.ImaServerSideAdInsertionMediaSource;
@@ -301,6 +302,10 @@ public class PlayerActivity extends AppCompatActivity
   }
 
   private MediaSource.Factory createMediaSourceFactory() {
+    DefaultDrmSessionManagerProvider drmSessionManagerProvider =
+        new DefaultDrmSessionManagerProvider();
+    drmSessionManagerProvider.setDrmHttpDataSourceFactory(
+        DemoUtil.getHttpDataSourceFactory(/* context= */ this));
     ImaServerSideAdInsertionMediaSource.AdsLoader.Builder serverSideAdLoaderBuilder =
         new ImaServerSideAdInsertionMediaSource.AdsLoader.Builder(/* context= */ this, playerView);
     if (serverSideAdsLoaderState != null) {
@@ -311,6 +316,7 @@ public class PlayerActivity extends AppCompatActivity
         new ImaServerSideAdInsertionMediaSource.Factory(
             serverSideAdsLoader, new DefaultMediaSourceFactory(dataSourceFactory));
     return new DefaultMediaSourceFactory(dataSourceFactory)
+        .setDrmSessionManagerProvider(drmSessionManagerProvider)
         .setAdsLoaderProvider(this::getClientSideAdsLoader)
         .setAdViewProvider(playerView)
         .setServerSideAdInsertionMediaSourceFactory(imaServerSideAdInsertionMediaSourceFactory);