Adds "Set a reminder" string.

Will be used for an Assistant suggestion chip.

Bug: b:111694337
Change-Id: I9acb85b359cd8d7293fe9163468ce1d63fec40d2
Reviewed-on: https://chromium-review.googlesource.com/1179971
Commit-Queue: David Black <dmblack@google.com>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584153}

ash/ash_strings.grd

@@ -1745,6 +1745,9 @@ This file contains the strings for ash.
       <message name="IDS_ASH_ASSISTANT_CHIP_SEND_AN_EMAIL" desc="Message shown on suggestion chip in Assistant UI to initiate a query to send an email.">
         Send an email
       </message>
+      <message name="IDS_ASH_ASSISTANT_CHIP_SET_A_REMINDER" desc="Message shown on suggestion chip in Assistant UI to initiate a query to set a reminder.">
+        Set a reminder
+      </message>
       <message name="IDS_ASH_ASSISTANT_CHIP_WHAT_CAN_YOU_DO" desc="Message shown on suggestion chip in Assistant UI to initiate a query for Assistant capabilities.">
         What can you do?
       </message>