[Live Caption] Update Live Caption subtitle string based on UX feedback.

Bug: 1055150, 1167349
Change-Id: I4c321cdfa6e00c3a8002cbea02e89fc2689e3ecd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633375Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Abigail Klein <abigailbklein@google.com>
Cr-Commit-Position: refs/heads/master@{#844972}

chrome/app/settings_strings.grdp

@@ -56,9 +56,16 @@
   <message name="IDS_SETTINGS_CAPTIONS_ENABLE_LIVE_CAPTION_TITLE" desc="Name of the setting to enable Live Caption feature.">
     Live Caption
   </message>
-  <message name="IDS_SETTINGS_CAPTIONS_ENABLE_LIVE_CAPTION_SUBTITLE" desc="Description text for Live Caption feature. When media is playing (such as a video) the user will see captions on the screen. Only works in Chrome browser initially.">
-    Automatically creates captions for media in Chrome browser (currently available in English only)
-  </message>
+  <if expr="chromeos">
+    <message name="IDS_SETTINGS_CAPTIONS_ENABLE_LIVE_CAPTION_SUBTITLE" desc="Description text for Live Caption feature. When media is playing (such as a video) the user will see captions on the screen. Only works in Chrome browser initially.">
+      Automatically creates captions for media in English (currently available in Chrome browser only). Audio and captions never leave the device.
+    </message>
+  </if>
+  <if expr="not chromeos">
+    <message name="IDS_SETTINGS_CAPTIONS_ENABLE_LIVE_CAPTION_SUBTITLE" desc="Description text for Live Caption feature. When media is playing (such as a video) the user will see captions on the screen.">
+      Automatically creates captions for media in English. Audio and captions never leave the device.
+    </message>
+  </if>
   <message name="IDS_SETTINGS_CAPTIONS_LIVE_CAPTION_DOWNLOAD_PROGRESS" desc="Download progress indicator after Live Caption is enabled. The user needs to download certain files for the feature to work.">
     Downloading speech recognition files... <ph name="PERCENT">$1<ex>17</ex></ph>%
   </message>

chrome/app/settings_strings_grdp/IDS_SETTINGS_CAPTIONS_ENABLE_LIVE_CAPTION_SUBTITLE.png.sha1

-4670b194f154b7a3dcac6d1f853a2c56735e7668
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+6494ae379debb393746d5fb4cbf605ff88cf19e6
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