Measure content provider and application class creation using AppComponentFactory

### Description

Similar to [papa](https://github.com/square/papa/blob/main/papa/src/main/java/papa/PerfAppComponentFactory.kt) we want to not only measure the `.onCreate()` timings, but rather the whole initialization, including class loading and any static init timings.

This is only available on Android P and above. More docs about `AppCompontentFactory` can be found [here](https://developer.android.com/reference/android/app/AppComponentFactory). It's usually registered via AndroidManifest.xml:

```xml

```

Things to consider:
* Could we auto install a `SentryAppComponentFactory` factory?
* How to deal with user-defined factories?
* How to deal with it pre P?

從 AppComponentFactory 文件和 issue 中的 AndroidManifest.xml 註冊範例開始。將初始化時機的整體目標與現有的 papa PerfAppComponentFactory 參考實作進行比較，然後確定自動安裝、使用者定義的 factories 以及 Android P 之前的行為應如何運作。當這些相容性與整合問題都有了文件化且達成共識的實作路徑時，即視為完成。

由索引模型根據 Issue 內容生成。