[PWD Editing Android] Add save action to the password editing fragment

Save action is a prerequisite for the future commit that will save the
changes made on the password.

Bug: 377410
Change-Id: I6482ad013a9fb1acc909a461ceb623f7d809cb3a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1710315Reviewed-by: Friedrich [CET] <fhorschig@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Ivana Zuzic <izuzic@google.com>
Cr-Commit-Position: refs/heads/master@{#681764}

chrome/android/java/res/menu/password_entry_editor_action_bar_menu.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2019 The Chromium Authors. All rights reserved.
+     Use of this source code is governed by a BSD-style license that can be
+     found in the LICENSE file. -->
+
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto" >
+
+    <item
+        android:id="@+id/action_save_edited_password"
+        android:title="@string/save"
+        app:showAsAction="always"/>
+</menu>
\ No newline at end of file

chrome/android/java/src/org/chromium/chrome/browser/preferences/password/PasswordEntryEditor.java

@@ -7,6 +7,8 @@ package org.chromium.chrome.browser.preferences.password;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.EditText;
@@ -25,6 +27,7 @@ public class PasswordEntryEditor extends Fragment {
     @Override
     public View onCreateView(
             LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        setHasOptionsMenu(true);
         getActivity().setTitle(R.string.password_entry_viewer_edit_stored_password_action_title);
         return inflater.inflate(R.layout.password_entry_editor, container, false);
     }
@@ -44,4 +47,9 @@ public class PasswordEntryEditor extends Fragment {
         mUsernameText.setText(mSavedPasswordEntry.getUserName());
         mPasswordText.setText(mSavedPasswordEntry.getPassword());
     }
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        inflater.inflate(R.menu.password_entry_editor_action_bar_menu, menu);
+    }
 }
\ No newline at end of file