Doc change: fix typo in platform highlights.

Change-Id: I6df4128c79705f97f029ba7ed13c0ae3d5807f18

Author: ddougherty

docs/html/sdk/android-4.0-highlights.jd

@@ -176,7 +176,7 @@ responses and manage the list from the Settings app.</p>
 <p style="margin-top:1em;margin-bottom:.75em;"><strong>Swipe to dismiss
 notifications, tasks, and browser tabs</strong></p>
 
-<p>Android 4.0 makes managing notifications, recent apps, and brwoser tabs even
+<p>Android 4.0 makes managing notifications, recent apps, and browser tabs even
 easier. Users can now dismiss individual notifications, apps from the Recent
 Apps list, and browser tabs with a simple swipe of a finger. </p>