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
1 file changed