Add strings for tab group sharing

Bug: 1017492
Change-Id: Ie2b27670eb157d2f73f0720748bb9fa6413af64a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1912647
Commit-Queue: Peter Wen <wnwen@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714905}

build/android/lint/suppressions.xml

@@ -338,6 +338,8 @@ Still reading?
     <ignore regexp="The resource `R.string.tab_suggestion_review_button` appears to be unused"/>
     <ignore regexp="The resource `R.string.tab_suggestion_close_tab_action_button` appears to be unused"/>
     <ignore regexp="The resource `R.string.tab_suggestion_close_stale_message` appears to be unused"/>
+    <!-- crbug.com/1017492 remove this line and the following line after the bug is resolved -->
+    <ignore regexp="The resource `R.string.tab_grid_dialog_toolbar_share_group` appears to be unused"/>
     <!-- 3 raw resources are accessed by URL in various places -->
     <ignore regexp="PRODUCT_DIR/gen/remoting/android/.*/res/raw/credits.html"/>
     <ignore regexp="PRODUCT_DIR/gen/remoting/android/.*/res/raw/credits_css.css"/>

chrome/android/features/tab_ui/java/strings/android_chrome_tab_ui_strings.grd

@@ -174,6 +174,9 @@
       <message name="IDS_TAB_GRID_DIALOG_SELECTION_MODE_REMOVE" desc="This texts shows on the action button of tab group selection mode. When user clicks this action button, all the tabs that are currently selected will be moved out of tab group. One thing worth mentioning here is that the remove here does not mean delete, it means move tab out of tab group and becomes a single tab.">
         Remove
       </message>
+      <message name="IDS_TAB_GRID_DIALOG_TOOLBAR_SHARE_GROUP" desc="This text shows in the TabGridDialog toolbar menu as one menu item. When user selects this item, the share sheet will show which allows user to share current tab group via Gmail, Messages or copy to clipboard etc, in the format of a list of URLs representing the current tab group.">
+        Share group
+      </message>
 
       <!-- Tab Grid Drag-and-drop IPH strings -->
       <message name="IDS_IPH_DRAG_AND_DROP_INTRODUCTION" desc="This text shows on the entry point for the in-product help for drag-and-drop. It introduces that this IPH is about how to use drag-and-drop.">

chrome/browser/ui/android/strings/android_chrome_strings_grd/IDS_TAB_GRID_DIALOG_TOOLBAR_SHARE_GROUP.png.sha1

+74a4a485e31275d39e3e38cf65d71ccd1d44a61e
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