Sample still using Deprecated Firebase AdMob firebase::admob

首先定位 AdMob 示例文件以及 common_main.cc 中显示的 firebase::admob 引用，然后检查当前的 Google Mobile Ads C++ SDK API。当受影响的示例不再使用已弃用的命名空间，并且能够为报告的 Android 目标成功构建时，工作就完成了。

[REQUIRED] Please fill in the following fields:

• Which Firebase Sample: Admob(Auth, Database, etc.)
• Firebase C++ SDK version: firebase_cpp_sdk_11.6.0
• Additional SDKs you are using: Admob (Facebook, AdMob, etc.)
• Platform you are using the SDK on: Windows (Mac, Windows, or Linux)
• Platform you are targeting: Android(iOS, Android, and/or desktop)

[REQUIRED] Please describe the issue here:

The sample files seem to be out of date, they have not been update to include the change from
recated Firebase AdMob C++ SDK"firebase::admob" to New Google Mobile Ads C++ SDK

(Please list the full steps to reproduce the issue. Include device logs, and stack traces if available.)

Steps to reproduce:

What's the issue repro rate? (eg 100%, 1/5 etc)

What happened? How can we make the problem occur?
This could be a description, log/console output, etc.

Download and following information in sample to setup and run a sample code

If you have a downloadable sample project that reproduces the bug you're reporting, you will
likely receive a faster response on your issue.

// A simple listener that logs changes to a BannerView.
class LoggingBannerViewListener : public firebase::admob::BannerView::Listener {
 public:
  LoggingBannerViewListener() {}
  void OnPresentationStateChanged(
      firebase::admob::BannerView* banner_view,
      firebase::admob::BannerView::PresentationState state) override {
    ::LogMessage("BannerView PresentationState has changed to %d.", state);
  }
  void OnBoundingBoxChanged(firebase::admob::BannerView* banner_view,
                            firebase::admob::BoundingBox box) override {
    ::LogMessage(
        "BannerView BoundingBox has changed to (x: %d, y: %d, width: %d, "
        "height %d).",
        box.x, box.y, box.width, box.height);
  }
};`// A simple listener that logs changes to a BannerView.
class LoggingBannerViewListener : public firebase::admob::BannerView::Listener {
 public:
  LoggingBannerViewListener() {}
  void OnPresentationStateChanged(
      firebase::admob::BannerView* banner_view,
      firebase::admob::BannerView::PresentationState state) override {
    ::LogMessage("BannerView PresentationState has changed to %d.", state);
  }
  void OnBoundingBoxChanged(firebase::admob::BannerView* banner_view,
                            firebase::admob::BoundingBox box) override {
    ::LogMessage(
        "BannerView BoundingBox has changed to (x: %d, y: %d, width: %d, "
        "height %d).",
        box.x, box.y, box.width, box.height);
  }
};

E:/code2023/123456/testapp/src/common_main.cc:26:52: error: no member named 'admob' in namespace 'firebase'
class LoggingBannerViewListener : public firebase::admob::BannerView::Listener {`