Handle the voice search intent.

Once the voice search intent has been handled, the title bar
background changes to green, and touching it displays other voice
search possibilities.

Fixes http://b/issue?id=2390686
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 73fb710..6ef43fa 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -55,6 +55,10 @@
                   android:configChanges="orientation|keyboardHidden"
                   android:theme="@style/BrowserTheme"
                   android:windowSoftInputMode="adjustResize" >
+            <intent-filter>
+                <action android:name="android.speech.action.VOICE_SEARCH_RESULTS" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
             <!-- For these schemes were not particular MIME type has been
                  supplied, we are a good candidate. -->
             <intent-filter>