CallLogProvider does not use cleartext network traffic.

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

Bug: 19215516
Change-Id: Ia10db29151645242a6758a1a4205280adb6e9e29
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index bf486de..1ee54f0 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -6,7 +6,8 @@
     <application android:label="@string/app_label"
         android:icon="@drawable/app_icon"
         android:allowBackup="true"
-        android:backupAgent="CallLogBackupAgent">
+        android:backupAgent="CallLogBackupAgent"
+        android:usesCleartextTraffic="false">
 
         <meta-data android:name="com.google.android.backup.api_key"
             android:value="AEdPqrEAAAAISbHhhUji6KZyyjz4I8-MdBqlnoiTJoFAEUHHzA" />