Fix the Oem marker written to Call log backup.

The addCallToBackup() of CallLogBackupAgent.java wrote the OEM maker as:
data.wirteInt(END_OEM_DATA_MAKER + 1)
but while restoring it, we just readInt() and compare the retrieved
marker with END_OEM_DATA_MAKER, so it always fails.
Detected via CTS test failure in b/22776570.

BUG: 22776570
Change-Id: Ifc76ae9e66deec81edd2b049116f0eb6d260adf9
diff --git a/src/com/android/providers/calllogbackup/CallLogBackupAgent.java b/src/com/android/providers/calllogbackup/CallLogBackupAgent.java
index 7d43fd1..8f211b6 100644
--- a/src/com/android/providers/calllogbackup/CallLogBackupAgent.java
+++ b/src/com/android/providers/calllogbackup/CallLogBackupAgent.java
@@ -379,7 +379,7 @@
             data.writeUTF(oemData.namespace);
             data.writeInt(oemData.bytes.length);
             data.write(oemData.bytes);
-            data.writeInt(END_OEM_DATA_MARKER + 1);
+            data.writeInt(END_OEM_DATA_MARKER);
 
             data.flush();