Fix for reconnecting when Android app comes to the foreground (1.43.x backport) #8905
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When an app goes to the background, onBlockedStatusChanged is called with true and then called with false when it comes back to the foreground. The function onAvailable isn't called in this case and the connection wasn't being reset. Closes #8850
I noticed the comment that this is used for API versions 24+ but onBlockedStatusChanged was added in 29. I'm not sure if some kind of guard needs to be added or not.
https://developer.android.com/reference/android/net/ConnectivityManager.NetworkCallback#onBlockedStatusChanged(android.net.Network,%20boolean)
Backport of #8855
CC @litclimbing, @larssn