Modify name certificate dialog

Context
* Talkback does not announce dialog
  title when name certificate dialog
  is shown.

Changes
* Remove TextView for title from
  name_certificate_dialog.xml
* Add dialog.setTitle() instead

Bug: 152456397
Test: manual testing

Manual Testing Steps
- Add a certificate to device
- Go to Settings > Security >
  Encryption & Credentials >
  Install a certificate >
  VPN & app user certificate
- Select certificate and verify
  dialog title is displayed
  correctly

Change-Id: I76950aa5ccf28de7553a554a48332e15861b16f7
diff --git a/res/layout/name_certificate_dialog.xml b/res/layout/name_certificate_dialog.xml
index c838ba8..baa15d9 100644
--- a/res/layout/name_certificate_dialog.xml
+++ b/res/layout/name_certificate_dialog.xml
@@ -24,11 +24,6 @@
             android:layout_height="wrap_content"
             android:padding="16dp">
 
-        <TextView android:layout_width="match_parent"
-                  android:layout_height="wrap_content"
-                  android:text="@string/name_credential_dialog_title"
-                  style="@style/dialog_title"/>
-
         <TextView android:id="@+id/error"
                   android:layout_width="match_parent"
                   android:layout_height="wrap_content"
diff --git a/src/com/android/certinstaller/CertInstaller.java b/src/com/android/certinstaller/CertInstaller.java
index a487180..656715f 100644
--- a/src/com/android/certinstaller/CertInstaller.java
+++ b/src/com/android/certinstaller/CertInstaller.java
@@ -458,6 +458,7 @@
 
         Dialog d = new AlertDialog.Builder(this)
                 .setView(view)
+                .setTitle(R.string.name_credential_dialog_title)
                 .setPositiveButton(android.R.string.ok, (dialog, id) -> {
                     String name = mView.getText(R.id.certificate_name);
                     if (TextUtils.isEmpty(name)) {