Set suw description textview to fixed id

Heavy theme supports to costomize description text style. Modify it to fixed id
that can be customized by partner resource.

Heavy theme screenshot: https://screenshot.googleplex.com/TL4M7wmTaPg
Set fixed id screenshot: https://screenshot.googleplex.com/CA6QHoNTQBZ

Test: atest
Bug: 121988926
Change-Id: I8882acd49e7d57f24afa9dd6f3e9abfd06556053

src/com/android/settings/biometrics/BiometricEnrollIntroduction.java

@@ -266,7 +266,7 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
     protected void initViews() {
         super.initViews();
 
-        TextView description = (TextView) findViewById(R.id.description_text);
+        TextView description = (TextView) findViewById(R.id.sud_layout_description);
         if (mBiometricUnlockDisabledByAdmin) {
             description.setText(getDescriptionResDisabledByAdmin());
         }