Update packages repo web integration test examples index.html files to support WASM #151663
Description
These packages need their integration test index.html files updated to support running builds compiled to WASM:
- camera_web (handled by [camera_web] Migrate to
package:webpackages#7012) - file_selector_web
- google_sign_in_web
- image_picker_for_web
- shared_preferences_web
- url_launcher_web
- video_player_web
This is complete when there are no index.html files left that reference main.dart.js instead of flutter_bootstrap.js