Add Hotspot WPA3 Settings

- Add WPA3 SAE security types
  - "WPA3-Personal"
  - "WPA2/WPA3-Personal"

- Verify valid WPA3 password

- Enable QR code scanner for Hotspot WPA3

- Avoid null point exception when settings keyword searching

- Screenshot
  https://screenshot.googleplex.com/B6u54wh8w35Xnyf
  https://screenshot.googleplex.com/8hWHHUTb6UaS9vB

Bug: 167968488
Test: manual test
- atest WifiTetherSecurityPreferenceControllerTest
- atest WifiUtilsTest

Change-Id: I2992040498f8add107a4cce70a92c1c6ee6ab805

src/com/android/settings/wifi/WifiUtils.java

@@ -56,12 +56,12 @@ public class WifiUtils {
     }
 
     /**
-     * Check if the WPA2-PSK hotspot password is valid.
+     * Check if the hotspot password is valid.
      */
-    public static boolean isHotspotWpa2PasswordValid(String password) {
+    public static boolean isHotspotPasswordValid(String password, int securityType) {
         final SoftApConfiguration.Builder configBuilder = new SoftApConfiguration.Builder();
         try {
-            configBuilder.setPassphrase(password, SoftApConfiguration.SECURITY_TYPE_WPA2_PSK);
+            configBuilder.setPassphrase(password, securityType);
         } catch (IllegalArgumentException e) {
             return false;
         }