Update VTS SupplicantStaIfaceAidlTest#SetCountryCode to US

Bug: 323694622
Bug: 334053791
Test: VTS SupplicantStaIfaceAidlTest
(cherry picked from https://android-review.googlesource.com/q/commit:73e55bdbcf03a990fafd06abc585e1d2521b9c18)
Merged-In: Idad4127ce26188145c7b07d60d5e6ce40a80aa5b
Change-Id: Idad4127ce26188145c7b07d60d5e6ce40a80aa5b
diff --git a/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp b/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
index 5d00485..4768005 100644
--- a/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
+++ b/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
@@ -407,7 +407,7 @@
  * SetCountryCode
  */
 TEST_P(SupplicantStaIfaceAidlTest, SetCountryCode) {
-    const std::vector<uint8_t> countryCode = {'M', 'X'};
+    const std::vector<uint8_t> countryCode = {'U', 'S'};
     EXPECT_TRUE(sta_iface_->setCountryCode(countryCode).isOk());
 }