[BUG] net-adb has no server keys

[pc-coholic]

Steps To Reproduce

1. Enable Developer Mode
2. Enable "ADB over network" in Developer Mode
3. Try to connect to the device through by using `adb connect <ip>
4. The RSA authentication window is not shown and the connection will fail due to a lack of ADB_VENDOR_KEYS

Expected behavior

• System generates the appropriate keys
• System displays the authentication screen
• Connection is established

Screenshots

martin@tabarchat:~$ adb connect 192.168.1.101
* daemon not running; starting now at tcp:5037
* daemon started successfully
failed to authenticate to 192.168.1.101:5555
martin@tabarchat:~$ adb shell
adb: device unauthorized.
This adb server's $ADB_VENDOR_KEYS is not set
Try 'adb kill-server' if that seems wrong.
Otherwise check for a confirmation dialog on your device.

BlissRoms source:

• Bliss version: 11.13 (official build)
• Build: android_x86_64_userdebug 9 PQ2A.190405.003 eng.electr.20201113.152513 test-keys

Device:

• Codename (ex. bullhead): Virtualbox
• Build date (ex. 20200204): 20201113

Additional information

• Possible workarounds include manually pushing a keyfile to data/misc/adb/adb_keys/