[google_maps_flutter_android] Heatmap Deprecation is blocking Dependabot

[mboetger]

Dependabot update is broken on a deprecated API: flutter/packages#10390

> Task :google_maps_flutter_android:compileDebugJavaWithJavac
/b/s/w/ir/x/w/packages/packages/google_maps_flutter/google_maps_flutter_android/android/src/main/java/io/flutter/plugins/googlemaps/HeatmapController.java:37: warning: [deprecation] setWeightedData(Collection<WeightedLatLng>) in HeatmapTileProvider has been deprecated
    heatmap.setWeightedData(weightedData);
           ^
error: warnings found and -Werror specified
1 error
1 warning

Heatmaps in general are being deprecated from the Google Maps API

[stuartmorgan-g]

Heatmaps in general are being deprecated from the Google Maps API

The link only discusses the "Maps JavaScript API", which is the web SDK; I can't find anything currently that suggests that it's being deprecated for Android and iOS.

This specific deprecation is just a simple rename, so we should be able to update that PR to just include changing the method we call.

[reidbaker]

Updated the pr and example app builds locally. If the tests pass will merge.

[reidbaker]

I think this pr googlemaps/android-maps-utils#1573 when converting to kotlin removed the public members we were relying on in our tests. Despite the release notes not mentioning that this was a breaking change https://github.com/googlemaps/android-maps-utils/releases/tag/v3.16.0.

[reidbaker]

Fixed in flutter/packages#10390