Add user-selected search providers to browser

The lists of search providers are taken from Chrome.

Change-Id: I7af6dc1258950d1fc5cf86013f8be9f3c5db0f1a
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 7e98019..36e2820 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -30,6 +30,7 @@
     <uses-permission android:name="android.permission.SET_WALLPAPER" />
     <uses-permission android:name="android.permission.WAKE_LOCK"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_SETTINGS" />
     <uses-permission android:name="com.android.browser.permission.READ_HISTORY_BOOKMARKS"/>
     <uses-permission android:name="com.android.browser.permission.WRITE_HISTORY_BOOKMARKS"/>
     <uses-permission android:name="android.permission.SEND_DOWNLOAD_COMPLETED_INTENTS" />