Fix broadcast receiver register on android 14.0/34+

[Redth]

This adds a new helper method for registering broadcast receivers, which takes a bool for exporting the service or not, and on API 34 and higher, it calls the newer overload which takes the ReceiverFlags and passes the corresponding NotExported or Exported value to the bool parameter of the util method.

This allows us to call the right overload if we are on API 34 (Android 14.0) or newer where the declaration is required.

Also some older GetLocale()/SetLocale() methods are removed which were unused.

Fixes #17861

[Redth]

I haven't been able to test on an Android 14.0 (API 34) device, and the documentation is not the clearest to me:

If this receiver is listening for broadcasts sent from the system or from other apps—even other apps that you own—use the RECEIVER_EXPORTED flag. If instead this receiver is listening only for broadcasts sent by your app, use the RECEIVER_NOT_EXPORTED flag.

We are listening for system events, so it sounds like we should use RECEIVER_EXPORTED however it seems to work just fine with RECEIVER_NOT_EXPORTED on the simulator.

[mattleibow]

https://developer.android.com/reference/android/content/Context#registerReceiver(android.content.BroadcastReceiver,%20android.content.IntentFilter,%20java.lang.String,%20android.os.Handler)

For apps targeting Build.VERSION_CODES.UPSIDE_DOWN_CAKE, either RECEIVER_EXPORTED or RECEIVER_NOT_EXPORTED must be specified if the receiver is not being registered for system broadcasts or a SecurityException will be thrown.

[PureWeen]

I tested the connectivity sample in essentials and it no longer crashes with these changes

[mattleibow]

Needs tests, will add.

added tests

[mattleibow]

I tested on a Pixel 6 with Android 14 / API 34 and a Samsung A53 5G with Android 13 / API 33. I could reproduce the crash for Connectivity, and this PR fixed it. I did not observe crashes for Battery, and this PR does not seem to change anything.

I added some tests that confirmed my observations before & after the PR.

[mattleibow]

Once this is merged, it should appear on the nightly feeds.

[Alex-Dobrynin]

When this fix will be released? Today I've downloaded new VS with .net 8 and other updates and got this crash