p2p: set ap_configured_cb during p2p group reform process

In the remove-and-reform process, ap_configured_cb is cleared.
If a group is not started, p2p_go_configured will not be called
after completing AP setup.

Bug: 166276733
Test: atest CtsWifiTestCases
Change-Id: I0c791c2e6f27b7d41928bf5cfe6673a8276c629d
1 file changed