fix(wpa_supplicant): Add current bss channel as hint to scanning

- Add current bss channel as hint to scanning during supplicant connect
  making the process faster.

components/wpa_supplicant/esp_supplicant/src/esp_common.c

@@ -612,6 +612,7 @@ void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
 	/* We only support roaming in same ESS, therefore only bssid setting is needed */
 	os_memcpy(config->sta.bssid, bss->bssid, ETH_ALEN);
 	config->sta.bssid_set = 1;
+	config->sta.channel = bss->channel;
 	/* supplicant connect will only be called in case of bss transition(roaming) */
 	esp_wifi_internal_issue_disconnect(WIFI_REASON_BSS_TRANSITION_DISASSOC);
 	esp_wifi_set_config(WIFI_IF_STA, config);

components/wpa_supplicant/src/common/wnm_sta.c

@@ -805,6 +805,9 @@ static void wnm_set_scan_freqs(struct wpa_supplicant *wpa_s)
 				   MAC2STR(nei->bssid));
 			return;
 		}
+		if (wpa_s->current_bss && (os_memcmp(nei->bssid, wpa_s->current_bss->bssid, ETH_ALEN) == 0)) {
+		    continue;
+		}
 		if (nei->channel_number != chan) {
 			chan = nei->channel_number;
 			num_chan++;