2540 [connectivity] Add macos example (cla: yes)

2541 Updates gitignore with unwanted macos files (cla: yes)

2542 [path_provider] Move package into a path_provider directory (cla: yes)

2543 add dev_dependency:pedantic to all plugins (cla: yes)

2547 [google_sign_in] Add new Oauth scope methods to google_sign_in_platform_interface. (cla: yes)

2549 [e2e] fix flutter driver code snippet in readme and improve formatting of code snippets (cla: yes)

2551 [flutter-plugin-android-lifecycle] Update Gradle version (cla: yes)

2552 [url_launcher] fix: url_launcher - updated _launchUniversalLinkIos and Added Tests (cla: yes, waiting for test harness)