Bumped flutter sdk version; added vscode devcontainer extensions

.devcontainer/devcontainer.json

@@ -34,7 +34,16 @@
 	// "postCreateCommand": "cat /etc/os-release",
 
 	// Configure tool-specific properties.
-	// "customizations": {},
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"dart-code.flutter",
+				"toroxx.vscode-avdmanager",
+				"androidgradletools.android-ide-extension",
+				"ms-vscode.cmake-tools"
+			]
+		}
+	},
 
 	// Uncomment to connect as an existing user other than the container default. More info: https://aka.ms/dev-containers-non-root.
 	// "remoteUser": "devcontainer"

dev-init/dev.env

@@ -1,6 +1,6 @@
 
 FLUTTER_ROOT=/opt/flutter
-FLUTTER_VERSION=3.22.3
+FLUTTER_VERSION=3.44.2
 FLUTTER_SAMPLE_PROJECT=/opt/sample_projects/flutter_linux_web_demo
 RUST_SAMPLE_PROJECT=/opt/sample_projects/flutter_rust_demo
 ANDROID_SAMPLE_PROJECT=/opt/sample_projects/flutter_android_demo