Added peek api snippets.

PiperOrigin-RevId: 914984233

Author: Nicholas Ventimiglia

java/NextGenExample/app/src/main/java/com/example/snippets/InterstitialAdSnippets.java

@@ -128,5 +128,15 @@ public void onAdPaid(AdValue value) {
   private boolean isAdAvailable(String adUnitId) {
     return InterstitialAdPreloader.isAdAvailable(adUnitId);
   }
+
   // [END isAdAvailable]
+
+  // [START peek_ad]
+  private void peekAd(String preloadId) {
+    ResponseInfo responseInfo = InterstitialAdPreloader.peekAdResponseInfo(preloadId);
+    if (responseInfo != null) {
+      Log.d(TAG, "Peeked ad response ID: " + responseInfo.getResponseId());
+    }
+  }
+  // [END peek_ad]
 }

kotlin/NextGenExample/app/src/main/java/com/example/snippets/InterstitialAdSnippets.kt

@@ -116,6 +116,16 @@ private class InterstitialAdSnippets {
 
   // [END isAdAvailable]
 
+  // [START peek_ad]
+  private fun peekAd(preloadId: String) {
+    val responseInfo = InterstitialAdPreloader.peekAdResponseInfo(preloadId)
+    if (responseInfo != null) {
+      Log.d(TAG, "Peeked ad response ID: ${responseInfo.responseId}")
+    }
+  }
+
+  // [END peek_ad]
+
   private companion object {
     const val TAG = "InterstitialAdSnippets"
   }