[lochstar]

Description

This change is based on an old discussion at #3425.

When multiple draggable PointAnnotation are visible on a pan-able map, it is very easy to accidentally trigger the drag event of the PointAnnotation whilst moving around the map.

This issue only exists on Android, iOS already implements a long-press to start the drag. This PR aligns the behaviour.

A prop has been added to restore the current Android behaviour: androidInstantDraggable. I've added a toggle to the example app on the "Show Point Annotation" page to test the behaviour.

How to verify

Android only: Example App > Annotations > Show Point Annotation:

• tap selects, longPress then drag triggers the events: onDragStart, onDrag, onDragEnd
• toggle the "Android: Instant draggable" switch to observe the old/instant drag behaviour.

---

Whilst testing in the example app, I noticed there is a crash when pressing "Render Polygon above", fix is here: #4362

Checklist

• I've read CONTRIBUTING.md
• I updated the doc/other generated code with running yarn generate in the root folder
• I have tested the new feature on /example app.
  • In V11 mode/ios
  • In New Architecture mode/ios
  • In V11 mode/android
  • In New Architecture mode/android
• I added/updated a sample - if a new feature was implemented (/example)

[mfazekas]

Thanks @lochstar, this makes sense. Requiring a long-press before dragging a PointAnnotation on Android avoids accidental drags while panning, and matches iOS, so I'm happy for it to become the Android default.

Two requests before we merge:

1. Please add an option to opt back into the current behaviour, where a draggable annotation starts dragging right away without a long-press. Some apps rely on that, so they need a way to keep it.
2. Please move the RNMBXFillLayerManager aboveLayerID/belowLayerID null-handling fix into its own PR. It looks good, but it's unrelated, and keeping it separate makes both easier to review and revert.

Thanks again!

[lochstar]

Hey @mfazekas, thanks for checking this one out. I've made the requested changes. Let me know if you'd like anything else changed.
Cheers!