UI for manual heap growth detection

[pyricau]

Idea from @swankjesse:

• We need some sort of new UI to start a heap growth scenario, then communicate every manual iteration of it, and see result.
• Then users can manually perform the scenario N times, clicking a button in between, and each time they click we run the heap growth analysis, maybe telling them how much growth there's been, maybe with a "keep going" button

This would ideally just work out of the box with the normal LeakCanary dependency.

The biggest question here is the UI layer. A few considerations:

• Ideally I really don't want to add more UI code to the leakcanary-android dependency as it's barebone Android which makes that code hard to write & maintain.
• We could do it in the LeakCanary on device app.
• We'd need some way to click recording buttons while also using the app. I'm thinking maybe the chat head APIs. Or maybe notifications.
• Alternatively this could be a desktop app or Android Studio plugin.