2339 [webview_flutter] add gesture navigation for iOS (cla: yes)

2340 [camera] Resolve example null exception (cla: yes)

2341 [image_picker] Fix file not found exception (cla: yes, in review, waiting for test harness)

2342 [path_provider] Adds macOS support (cla: yes)

2343 [webview_flutter] Fix iOS WebView ignoring SafeArea widget and  iOS 13 WebView scroll indicator showing at random location. (cla: yes)

2345 Revert “[android_alarm_manager] Update minimum Flutter version to 1.12.0” (cla: yes)

2347 [e2e_macos] Remove redundant analysis_options.yaml (cla: yes)

2348 Add a plugin_platform_interface package (cla: yes)