feat: support set country code and locale after initialization

Author: quanquan1

affirm/src/main/java/com/affirm/android/Affirm.java

@@ -611,6 +611,50 @@ public static void setMerchantName(@Nullable String merchantName) {
                         .build());
     }
 
+    /**
+     * Updates the country code used by Affirm after initialization.
+     *
+     * @param countryCode Set the country code to be used by Affirm. Must not be null or empty.
+     */
+    public static void setCountryCode(@NonNull String countryCode) {
+        if (!isInitialized()) {
+            AffirmLog.w("Affirm has not been initialized");
+            return;
+        }
+
+        if (countryCode.isEmpty()) {
+            AffirmLog.w("Country code is empty. Please provide a valid country code.");
+            return;
+        }
+
+        AffirmPlugins.get().setConfiguration(
+                new Affirm.Configuration.Builder(AffirmPlugins.get().getConfiguration())
+                        .setCountryCode(countryCode)
+                        .build());
+    }
+
+    /**
+     * Updates the locale used by Affirm after initialization.
+     *
+     * @param locale Set the locale to be used by Affirm. Must not be null or empty.
+     */
+    public static void setLocale(@NonNull String locale) {
+        if (!isInitialized()) {
+            AffirmLog.w("Affirm has not been initialized");
+            return;
+        }
+
+        if (locale.isEmpty()) {
+            AffirmLog.w("Locale is empty. Please provide a valid locale string.");
+            return;
+        }
+
+        AffirmPlugins.get().setConfiguration(
+                new Affirm.Configuration.Builder(AffirmPlugins.get().getConfiguration())
+                        .setLocale(locale)
+                        .build());
+    }
+
     private static boolean isInitialized() {
         return AffirmPlugins.get() != null;
     }