[google_maps_flutter] deprecate old BitmapDescriptor methods (#6905)

Deprecates `BitmapDescriptor.fromAssetImage` in favor of `BitmapDescriptor.asset` and `AssetMapBitmap.create`.
Deprecates `BitmapDescriptor.fromBytes` in favor of `BitmapDescriptor.bytes` and `BytesMapBitmap`

This is part of the implementation of the following federated plugin PR: #4055

Related to issue: flutter/flutter#34657

packages/google_maps_flutter/google_maps_flutter_platform_interface/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 2.8.0
+
+* Deprecates `BitmapDescriptor.fromAssetImage` in favor of `BitmapDescriptor.asset` and `AssetMapBitmap.create`.
+* Deprecates `BitmapDescriptor.fromBytes` in favor of `BitmapDescriptor.bytes` and `BytesMapBitmap`
+
 ## 2.7.1
 
 * Undeprecates `BitmapDescriptor.fromAssetImage`.

packages/google_maps_flutter/google_maps_flutter_platform_interface/lib/src/types/bitmap.dart

@@ -179,6 +179,7 @@ class BitmapDescriptor {
   /// and scales the images to the right resolution depending on the dpi.
   /// Set `mipmaps` to false to load the exact dpi version of the image,
   /// `mipmap` is true by default.
+  @Deprecated('Use BitmapDescriptor.asset method instead.')
   static Future<BitmapDescriptor> fromAssetImage(
     ImageConfiguration configuration,
     String assetName, {
@@ -217,6 +218,7 @@ class BitmapDescriptor {
   /// bitmap, regardless of the actual resolution of the encoded PNG.
   /// This helps the browser to render High-DPI images at the correct size.
   /// `size` is not required (and ignored, if passed) in other platforms.
+  @Deprecated('Use BitmapDescriptor.bytes method instead.')
   static BitmapDescriptor fromBytes(Uint8List byteData, {Size? size}) {
     assert(byteData.isNotEmpty,
         'Cannot create BitmapDescriptor with empty byteData');

packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml

@@ -4,7 +4,7 @@ repository: https://github.com/flutter/packages/tree/main/packages/google_maps_f
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+maps%22
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.7.1
+version: 2.8.0
 
 environment:
   sdk: ^3.2.0