4101 Build all iOS example apps on current Flutter stable (cla: yes, waiting for tree to go green, p: battery, p: share, p: package_info, p: wifi_info_flutter, p: sensors, p: connectivity, p: device_info, platform-ios)

4137 [various] Prepare plugin repo for binding API improvements (cla: yes, waiting for tree to go green, p: battery, p: webview_flutter, p: camera, p: video_player, p: sensors, p: connectivity)