fix: add stub for IMA and option to enable it on demand

android/src/main/java/com/google/ads/interactivemedia/v3/api/AdEvent.java

@@ -0,0 +1,11 @@
+package com.google.ads.interactivemedia.v3.api;
+
+import androidx.annotation.InspectableProperty;
+
+public abstract class AdEvent {
+    public abstract InspectableProperty getType();
+
+    public interface AdEventListener {
+        public void onAdEvent(AdEvent adEvent);
+    }
+}

android/src/main/java/com/google/android/exoplayer2/ext/ima/ImaAdsLoader.java

@@ -0,0 +1,65 @@
+package com.google.android.exoplayer2.ext.ima;
+
+import androidx.annotation.Nullable;
+
+import com.facebook.react.uimanager.ThemedReactContext;
+import com.google.android.exoplayer2.ExoPlayer;
+import com.google.android.exoplayer2.Player;
+import com.google.android.exoplayer2.source.ads.AdsLoader;
+import com.google.android.exoplayer2.source.ads.AdsMediaSource;
+import com.google.android.exoplayer2.ui.AdViewProvider;
+import com.google.android.exoplayer2.upstream.DataSpec;
+
+import java.io.IOException;
+
+public class ImaAdsLoader implements AdsLoader {
+    public void setPlayer(ExoPlayer player) {
+    }
+
+    @Override
+    public void setPlayer(@Nullable Player player) {
+
+    }
+
+    public void release() {
+    }
+
+    @Override
+    public void setSupportedContentTypes(int... ints) {
+
+    }
+
+    @Override
+    public void start(AdsMediaSource adsMediaSource, DataSpec dataSpec, Object o, AdViewProvider adViewProvider, EventListener eventListener) {
+
+    }
+
+    @Override
+    public void stop(AdsMediaSource adsMediaSource, EventListener eventListener) {
+
+    }
+
+    @Override
+    public void handlePrepareComplete(AdsMediaSource adsMediaSource, int i, int i1) {
+
+    }
+
+    @Override
+    public void handlePrepareError(AdsMediaSource adsMediaSource, int i, int i1, IOException e) {
+
+    }
+
+    public static class Builder {
+        public Builder(ThemedReactContext themedReactContext) {
+            
+        }
+
+        public Builder setAdEventListener(Object reactExoplayerView) {
+            return this;
+        }
+
+        public ImaAdsLoader build() {
+            return null;
+        }
+    }
+}