Request Focus in fingerprint rename dialog

Bug: 68841055
Test: Manual. dialog comes up with focused entry
Change-Id: I5bb1b7227c1323595bf7f483e11e87e2c3550093
diff --git a/src/com/android/settings/fingerprint/FingerprintSettings.java b/src/com/android/settings/fingerprint/FingerprintSettings.java
index 6eaf3d2..992c04b 100644
--- a/src/com/android/settings/fingerprint/FingerprintSettings.java
+++ b/src/com/android/settings/fingerprint/FingerprintSettings.java
@@ -781,6 +781,7 @@
                         if (mDeleteInProgress) {
                             mAlertDialog.getButton(AlertDialog.BUTTON_NEGATIVE).setEnabled(false);
                         }
+                        mDialogTextField.requestFocus();
                     }
                 });
                 if (mTextHadFocus == null || mTextHadFocus) {