Remove reference to missing string.

A support string was being used by non-support xml. These references
have been replaced with new ones so that things don't break.

Test: Robotests still pass
Change-Id: I5574aedca110b9795a68c2947be0a866bb21cb63
Fixes: 71858657
diff --git a/src/com/android/settings/wifi/details/WifiDetailPreferenceController.java b/src/com/android/settings/wifi/details/WifiDetailPreferenceController.java
index 70ee20d..82ffc38 100644
--- a/src/com/android/settings/wifi/details/WifiDetailPreferenceController.java
+++ b/src/com/android/settings/wifi/details/WifiDetailPreferenceController.java
@@ -280,7 +280,7 @@
                 .setButton1Text(R.string.forget)
                 .setButton1Positive(false)
                 .setButton1OnClickListener(view -> forgetNetwork())
-                .setButton2Text(R.string.support_sign_in_button_text)
+                .setButton2Text(R.string.wifi_sign_in_button_text)
                 .setButton2Positive(true)
                 .setButton2OnClickListener(view -> signIntoNetwork());