[iOS] Annotations are not selectable (added via iosapp menu)

[julianrex]

This appears to be separate from #15097, and may be a duplicate of #15088.

Reproduction steps:

1. Run iosapp
2. From the menu, select "Add 100 Views" (or sprites)
3. Do not interact with the map (pinch/pan/rotate)
4. Tap on one of the annotation views. Note that it is not selected, and the map's gesture recognizer fires and hides/shows the navigation bar at the top.

This is happening because these vectors

mapbox-gl-native/src/mbgl/text/collision_index.cpp

Lines 313 to 315 in a12d183

	std::vector<QueryResult> features = collisionGrid.queryWithBoxes(envelope);
	std::vector<QueryResult> ignoredFeatures = ignoredGrid.queryWithBoxes(envelope);
	features.insert(features.end(), ignoredFeatures.begin(), ignoredFeatures.end());

have zero size. This means an annotation is not detected, and the select tap gesture is stopped from recognizing.

If you move the map around you will eventually be able to select the annotations.

---

Note: a similar query, in the same frame, (that uses a much larger rect, larger than the viewport) returns all 100 annotations. It does look like that's a different mbgl::Placement instance...

Yep, these lines fire:

mapbox-gl-native/src/mbgl/renderer/render_orchestrator.cpp

Lines 364 to 372 in a12d183

	bool symbolBucketsChanged = false;
	const bool placementChanged = !placement->stillRecent(updateParameters.timePoint);
	std::set<std::string> usedSymbolLayers;
	if (placementChanged) {
	placement = std::make_unique<Placement>(
	updateParameters.transformState, updateParameters.mode,
	updateParameters.transitionOptions, updateParameters.crossSourceCollisions,
	std::move(placement));
	}

/cc @pozdnyakov @astojilj