[web] Switch all fonts to WOFF2 (non-split) (flutter/engine#56035)

Google Fonts serves TTF fonts gzipped. By switching to WOFF2 fonts, we get Brotli compression by design.

Google Font's WOFF2 fonts are 30%+ smaller than their gzipped TTF counterparts (including Roboto).

Author: mdebbar

DEPS

@@ -925,7 +925,7 @@ deps = {
       'packages': [
         {
           'package': 'flutter/flutter_font_fallbacks',
-          'version': '0570a0ea824083da79de07b131fc5df7f55dad4d6cba2ee704912ce7e4ce812a'
+          'version': '10da6a95fedad127634500aa854466fe9e3fa760220a2a1c7c20df84073fce76'
         }
       ],
       'dep_type': 'cipd',

engine/src/flutter/lib/web_ui/dev/roll_fallback_fonts.dart

@@ -312,7 +312,7 @@ OTHER DEALINGS IN THE FONT SOFTWARE.
     }
     final List<_FontInfo> processedFonts = <_FontInfo>[];
     final http.Response response = await client.get(Uri.parse(
-        'https://www.googleapis.com/webfonts/v1/webfonts?key=$apiKey'));
+        'https://www.googleapis.com/webfonts/v1/webfonts?capability=WOFF2&key=$apiKey'));
     if (response.statusCode != 200) {
       throw ToolExit('Failed to download Google Fonts list.');
     }

engine/src/flutter/lib/web_ui/lib/src/engine/canvaskit/fonts.dart

@@ -14,7 +14,7 @@ import 'package:ui/ui_web/src/ui_web.dart' as ui_web;
 // Roboto font. The API reference is here:
 // https://developers.google.com/fonts/docs/developer_api
 String _robotoUrl =
-    '${configuration.fontFallbackBaseUrl}roboto/v20/KFOmCnqEu92Fr1Me5WZLCzYlKw.ttf';
+    '${configuration.fontFallbackBaseUrl}roboto/v32/KFOmCnqEu92Fr1Me4GZLCzYlKw.woff2';
 
 /// Manages the fonts used in the Skia-based backend.
 class SkiaFontCollection implements FlutterFontCollection {