Supporting behavior changes when TargetSDK 34

This [line](https://github.com/bumptech/glide/blob/master/library/src/main/java/com/bumptech/glide/manager/SingletonConnectivityReceiver.java#L279) using context.registerReceiver, when using android 14 and app targeting SDK 34, we should specify flag exported/not exported.

https://developer.android.com/about/versions/14/behavior-changes-14#runtime-receivers-exported

Can you help doublecheck if it necessary to add that flag on this class?
Currently i dont see any issue on rendering image, but wondering if that flag will causing any issue in the background.

**Glide Version**: 4.16.0

**Integration libraries**:okhttp3

**Device/Android Version**: 14