Update language switching flag text.

Bug: N/A
Change-Id: I41626e917bf140bc6f13cd47910b8c452af70fd2
AX-Relnotes: N/A
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2216370Reviewed-by: David Tseng <dtseng@chromium.org>
Commit-Queue: Akihiro Ota <akihiroota@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772225}

chrome/browser/flag_descriptions.cc

@@ -3610,9 +3610,9 @@ const char kExperimentalAccessibilityChromeVoxAnnotationsDescription[] =
     "Allows users to create custom annotations for elements using ChromeVox.";
 
 const char kExperimentalAccessibilityChromeVoxLanguageSwitchingName[] =
-    "Enable experimental ChromeVox language switching.";
+    "Disable ChromeVox language switching.";
 const char kExperimentalAccessibilityChromeVoxLanguageSwitchingDescription[] =
-    "Enable ChromeVox language switching, which changes ChromeVox's "
+    "Disable ChromeVox language switching, which changes ChromeVox's "
     "output language upon detection of new language.";
 
 const char kExperimentalAccessibilityChromeVoxTutorialName[] =