adb-reverse
Android Debug Bridge Reverse: reverse socket connections from an Android emulator instance or connected Android devices.
TLDR
List all reverse socket connections from emulators and devices
$ adb reverse --list
Reverse a TCP port from an emulator or device to localhost
$ adb reverse tcp:[remote_port] tcp:[local_port]
Remove a reverse socket connections from an emulator or device
$ adb reverse --remove tcp:[remote_port]
Remove all reverse socket connections from all emulators and devices
$ adb reverse --remove-all