fix: defer Google marker add until custom view lays out

[lodev09]

Summary

Custom-view markers on Google Maps briefly showed the SDK default pin before the rasterized icon appeared.

• iOS: addMarkerViewToMap skips creating the GMSAdvancedMarker until layoutSubviews has run; markerViewDidLayout re-syncs and adds it with the correct icon.
• Android: processPendingMarkers now skips custom-view markers that haven't laid out, matching the existing guard in syncMarkerView; markerViewDidLayout adds them via updateIcon.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update

Test Plan

• Mount custom-view markers (rasterized and non-rasterized) on Google Maps, confirm no default pin flash
• Mount markers before the map is ready, confirm pending markers still appear
• Remove markers before layout, confirm no crash

Screenshots / Videos

N/A

Checklist

• I tested on iOS
• I tested on Android
• I tested on Web
• I updated the documentation (if needed)

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Project	Deployment	Actions	Updated
lugg-maps	Ready	Preview	Sep 28, 2026 6:54pm UTC