[Translate Manual Trigger] Relocate the translate menu button.

To increase visibility of the translate button on smaller screen device, we put it above the share
button. See discussion in PRD: go/chrome-translate-manual-trigger.

SCREENSHOT: https://screenshot.googleplex.com/NWuZVLCYSPn.png

Bug: 883456
Change-Id: I7d334995e9cf7d15c312d23027c99ea52937d27e
Reviewed-on: https://chromium-review.googlesource.com/c/1287093Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Alexandre Frechette <frechette@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604644}

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

@@ -44,6 +44,8 @@
             android:title="@string/menu_history" />
         <item android:id="@+id/downloads_menu_id"
             android:title="@string/menu_downloads" />
+        <item android:id="@+id/translate_id"
+            android:title="@string/menu_translate" />
         <item android:id="@+id/share_row_menu_id"
             android:title="@null">
           <menu>
@@ -53,8 +55,6 @@
                 android:title="@null" />
           </menu>
         </item>
-        <item android:id="@+id/translate_id"
-            android:title="@string/menu_translate" />
         <item android:id="@+id/find_in_page_id"
             android:title="@string/menu_find_in_page" />
         <item android:id="@+id/add_to_homescreen_id"