cros: Shortcuts string changes requested by TC

This cl made 3 string changes based on TC feedback.

Bug: b/77862935, b/77862860
Test: manual
Change-Id: Ic73441d6b5d246927eacc56daffdfbf2c65fb526
Reviewed-on: https://chromium-review.googlesource.com/1008409Reviewed-by: Qiang Xu <warx@google.com>
Commit-Queue: Tao Wu <wutao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550425}

ash/components/shortcut_viewer_strings.grdp

@@ -118,7 +118,7 @@
     <ph name="shift">$1<ex>Shift</ex></ph><ph name="separator1">$2<ex>+</ex></ph><ph name="alt">$3<ex>Alt</ex></ph><ph name="separator2">$4<ex>+</ex></ph><ph name="l">$5<ex>v</ex></ph>, then <ph name="tab">$6<ex>v</ex></ph> or <ph name="right">$7<ex>v</ex></ph>
   </message>
   <message name="IDS_KSV_DESCRIPTION_PREVIOUS_IME" desc="Description of the command in keyboard shortcut viewer.">
-    Switch to the previous language input method
+    Switch to the input method of the previous language
   </message>
   <message name="IDS_KSV_DESCRIPTION_CYCLE_FORWARD_MRU" desc="Description of the command in keyboard shortcut viewer.">
     Switch quickly between windows
@@ -166,7 +166,7 @@
     Turn Caps Lock on and off
   </message>
   <message name="IDS_KSV_DESCRIPTION_NEXT_IME" desc="Description of the command in keyboard shortcut viewer.">
-    Switch to the next language input method
+    Switch to the input method of the next language
   </message>
   <message name="IDS_KSV_DESCRIPTION_NEW_WINDOW" desc="Description of the command in keyboard shortcut viewer.">
     Open new window
@@ -595,7 +595,7 @@
     Show or hide the Developer Tools inspector
   </message>
   <message name="IDS_KSV_DESCRIPTION_IDC_FOCUS_INACTIVE_POPUP_FOR_ACCESSIBILITY" desc="Description of the command in keyboard shortcut viewer.">
-    Focus inactive popup for accessibility
+    Move focus to popups and dialogs
   </message>
   <message name="IDS_KSV_DESCRIPTION_IDC_SHOW_APP_MENU" desc="Description of the command in keyboard shortcut viewer.">
     Show app menu