Opt out Exchange from restricted profiles.

Bug: 11271155
Change-Id: I29d07fcd31b36bec1efb9b124b6ff612c078c889
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index a414c2d..0370578 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -70,6 +70,7 @@
         android:icon="@mipmap/icon"
         android:label="@string/app_name"
         android:name="Exchange"
+        android:requiredAccountType="com.android.exchange"
         android:theme="@android:style/Theme.Holo.Light"
         >