Allow ReportInteraction when app is in background

Crashes can happen when the app is in the background, e.g. during work performed in a `Worker`. In this case, the dialog interaction won't work, because on recent Android versions, we are not allowed to start activities while in the background.

However, when the app crashes in the foreground, I would like to use the dialog interaction, but having a fallback to the notification interaction when the app is in the background. I tried to somehow achieve this with a custom `ReportInteraction`, but couldn't get the ServiceLoader to work within a reasonable amount of time (or adding lots of other dependencies).

Ideally such behavior would be integrated here upstream, because many projects would benefit from this.

Start by finding the Android path that resolves `ReportInteraction` and chooses the active interaction during a crash. Map where foreground/background state is checked and where dialog vs notification interactions are registered, then adjust that selection logic so foreground uses dialog and background falls back to notification. Run interaction or crash-report tests (or the Android test task if available), and consider it done only when both foreground and background crash flows use the intended interaction without regressions.

由索引模型根據 Issue 內容生成。