enable impeller

{{cookiecutter.out_dir}}/android/app/src/main/AndroidManifest.xml

@@ -4,6 +4,9 @@
         android:label="{{ cookiecutter.project_name }}"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
+        <meta-data
+                android:name="io.flutter.embedding.android.EnableImpeller"
+                android:value="true"/>
         <activity
             android:name=".MainActivity"
             android:exported="true"

{{cookiecutter.out_dir}}/macos/Runner/Info.plist

@@ -2,6 +2,8 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+    <key>FLTEnableImpeller</key>
+    <true />
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleExecutable</key>