Fixing concurrency issue on IccPhoneBookInterfaceManager.

All the reads/updates methods are synchronous calls that rely
on an unique lock object in order to wait for the asynchronous
simcard operations to complete and return appropriate results

Concurent calls to these methods will cause errors when one
completed operation will unlock all waiting calls generating
inconsistent results on some of the method calls.

Change-Id: I8b87004ac039bcb971b8369f7640281f1bf9eb35
Signed-off-by: David Sobreira Marques <dpsmarques@gmail.com>