Update OS Power Settings strings to be form agnostic

In order to make more sense for a variety of device form factors, update
the OS Settings Power Page strings to use "Cover" rather than "Lid"


Bug: 997473
Change-Id: I9f36aed5dcaab03cc25d8f68b18a89a23306598d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913057
Auto-Submit: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714676}

chrome/app/settings_strings.grdp

@@ -4885,14 +4885,14 @@
     <message name="IDS_SETTINGS_POWER_IDLE_OTHER" desc="In Device Settings > Power, menu item for custom idle behavior.">
       Other
     </message>
-    <message name="IDS_SETTINGS_POWER_LID_CLOSED_SLEEP_LABEL" desc="In Device Settings > Power, label for suspending when lid is closed.">
-      Sleep when lid is closed
+    <message name="IDS_SETTINGS_POWER_LID_CLOSED_SLEEP_LABEL" desc="In Device Settings > Power, label for suspending when cover is closed.">
+      Sleep when cover is closed
     </message>
-    <message name="IDS_SETTINGS_POWER_LID_CLOSED_SIGN_OUT_LABEL" desc="In Device Settings > Power, label for signing out when lid is closed.">
-      Sign out when lid is closed
+    <message name="IDS_SETTINGS_POWER_LID_CLOSED_SIGN_OUT_LABEL" desc="In Device Settings > Power, label for signing out when cover is closed.">
+      Sign out when cover is closed
     </message>
-    <message name="IDS_SETTINGS_POWER_LID_CLOSED_SHUT_DOWN_LABEL" desc="In Device Settings > Power, label for shutting down when lid is closed.">
-      Shut down when lid is closed
+    <message name="IDS_SETTINGS_POWER_LID_CLOSED_SHUT_DOWN_LABEL" desc="In Device Settings > Power, label for shutting down when cover is closed.">
+      Shut down when cover is closed
     </message>
     <message name="IDS_SETTINGS_BATTERY_STATUS" desc="In Device Settings > Power, the battery status while the battery is discharging, showing the battery power as a percentage and the time left until the battery is empty.">
       <ph name="percentage">$1<ex>56</ex></ph>% - <ph name="time">$2<ex>2 hours and 20 minutes</ex></ph> left