Hide the char counter when nickname not focused

Video: https://drive.google.com/file/d/138nyvCrRQd80CHFlAWQlE13Lkp-dFyms/view?usp=sharing

Bug: 1082013
Change-Id: Icef37cfd081eb92be14fed1abe9faf90b2080508
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2225283Reviewed-by: Jared Saul <jsaul@google.com>
Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Siddharth Shah <siashah@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774910}

chrome/android/java/res/layout/autofill_local_card_editor.xml

@@ -113,7 +113,6 @@
     <com.google.android.material.textfield.TextInputLayout
         android:id="@+id/credit_card_nickname_label"
         android:labelFor="@+id/credit_card_nickname_edit"
-        app:counterEnabled="true"
         app:counterMaxLength="25"
         app:errorEnabled="true"
         android:layout_width="match_parent"

chrome/android/java/src/org/chromium/chrome/browser/autofill/settings/AutofillLocalCardEditor.java

@@ -78,6 +78,8 @@ public class AutofillLocalCardEditor extends AutofillCreditCardEditor {
         // Set the visibility of the nickname field based on the experiment flag.
         mNicknameLabel.setVisibility(isNicknameManagementEnabled() ? View.VISIBLE : View.GONE);
         mNicknameText.addTextChangedListener(nicknameTextWatcher());
+        mNicknameText.setOnFocusChangeListener(
+                (view, hasFocus) -> mNicknameLabel.setCounterEnabled(hasFocus));
         // Set text watcher to format credit card number
         mNumberText.addTextChangedListener(new CreditCardNumberFormattingTextWatcher());