added NotificationManager and Settings.System
added NotificationManager and Settings.System

bitter/android-jni-bridge,Unity-Technologies/android-jni-bridge,Unity-Technologies/android-jni-bridge,bitter/android-jni-bridge,bitter/android-jni-bridge,Unity-Technologies/android-jni-bridge,Unity-Technologies/android-jni-bridge,Unity-Technologies/android-jni-bridge,Unity-Technologies/android-jni-bridge,bitter/android-jni-bridge