Declare that Bluetooth app does not use cleartext network traffic.

This declares to the platform and tools that this app does not use
cleartext network traffic. The platform and tools will be blocking
(on best effort basis) attempts to use such traffic by this app.
For example, attempts to use HTTP (rather than HTTPS) will be blocked.

Bug: 19215516
Change-Id: I6e8f6aa5c37d73f33ec249b9f1e756afa9bb8ae4
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 5384b94..d261082 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -63,7 +63,8 @@
         android:name=".btservice.AdapterApp"
         android:icon="@drawable/bt_share"
         android:persistent="false"
-        android:label="@string/app_name">
+        android:label="@string/app_name"
+        android:usesCleartextTraffic="false">
         <uses-library android:name="javax.obex" />
         <provider android:name=".opp.BluetoothOppProvider"
             android:authorities="com.android.bluetooth.opp"