esp32: fix several misc wifi issue

1. Fix ssid_str not free issue
2. Fix sniffer not work issue
3. Fix null parameter cause esp_wifi_init crash issue
4. Enable ap ampdu rx interface

diff --git a/components/esp32/lib b/components/esp32/lib
index 45414a6778e1bf2855f18a8c6b954d5cf575bb40..d0b97976010528cbb469d5bb12f2c20449ca6c5b 160000 (submodule)
--- a/components/esp32/lib
+++ b/components/esp32/lib
@@ -1 +1 @@
-Subproject commit 45414a6778e1bf2855f18a8c6b954d5cf575bb40
+Subproject commit d0b97976010528cbb469d5bb12f2c20449ca6c5b