4413 [flutter_plugin_android_lifecycle] remove placeholder dart file (cla: yes, waiting for tree to go green, p: flutter_plugin_android_lifecycle)

p: android_alarm_manager - 5 pull request(s)

3216 [multiple] Java 8 target for all plugins with -Werror compiler arg (cla: yes, waiting for tree to go green, p: android_alarm_manager, p: android_intent, p: camera, p: path_provider, p: video_player, p: connectivity, platform-android)