4164 [camera_web] Add CameraOptions used to constrain the camera audio and video (cla: yes, waiting for tree to go green, p: camera, platform-web)

4166 [image_picker_for_web] Support multiple pick. Store name and other local file properties in XFile. (cla: yes, waiting for tree to go green, p: image_picker, platform-web)

4167 [multiple_web] Update web plugin testing instructions. (cla: yes, waiting for tree to go green, p: file_selector, p: google_maps_flutter, p: google_sign_in, p: url_launcher, p: video_player, p: connectivity, platform-web)

4168 [camera_web] Add Camera used to control video and take pictures (cla: yes, p: camera, platform-web)

4171 [flutter_plugin_tools] Use -version with java (cla: yes, waiting for tree to go green)