ANRWatchDog reports ANRs from another app when used in the system app

### Integration

sentry-android

### Build System

Gradle

### AGP Version

8.6.1

### Proguard

Enabled

### Version

8.11.1

### Steps to Reproduce

Other environment details: Android 6

1. Make the main app (when sentry installed) a system app. To achieve that, add `android:sharedUserId="android.uid.system"` to the android manifest
2. Trigger an ANR in another app - can be just an example app that simply uses Thread.sleep in the main thread
3. In the main app, we use Workmanager and some periodic workers, so the application eventually wakes up, then sleeps.

To simplify testing, I did something like in the main app:
```
viewModelScope.launch {
while (true) {
Timber.tag("ANR").i("isAnr=${ANRWatchDog.isProcessNotResponding}")
delay(5000)
}
}
```
Then, I opened another app which simply sleeps forever in onCreate.

This is happening because ANRWatchDog.isProcessNotResponding may return false positives for __system__ apps. That's happening because for system app `am.getProcessesInErrorState()` may return processes that do not belong to the current app because of wider permissions. I was able to validate this by checking `ActivityManager.ProcessErrorStateInfo.processName`.

### Expected Result

Main app doesn't report ANR from other apps

### Actual Result

Main app does report ANR from other apps

從 ANRWatchDog.isProcessNotResponding 以及報告中描述的 ActivityManager.ProcessErrorStateInfo.processName 值開始。在 Android 6 上使用一個設定了 android:sharedUserId="android.uid.system" 的系統應用程式，以及另一個會觸發 ANR 的應用程式進行重現；當主要應用程式不再回報另一個應用程式的 ANR 時即表示完成。

由索引模型根據 Issue 內容生成。