Add p2p_no_group_iface=1 to p2p_supplicant_overlay

Configures wpa_supplicant to use p2p0 mgmt iface instead of dynamically
created p2p-p2p0-XYZ virtual interfaces for P2P group.

Bug: 65524423
Test: CtsVerifier WifiDirect
Test: Manual verification
Change-Id: If657d8afff278c3c2a196b0ecab8d92c985999dd
diff --git a/p2p_supplicant_overlay.conf b/p2p_supplicant_overlay.conf
index acbace2..b5e89e0 100644
--- a/p2p_supplicant_overlay.conf
+++ b/p2p_supplicant_overlay.conf
@@ -1 +1,2 @@
 disable_scan_offload=1
+p2p_no_group_iface=1