Call and SMS blocker

Invalid date

* Main Bug Fixed. Blocking call is working fine now.
* Compatibility with Android 6.0 (Marshmallow)
* Hiding message Blocking feature from complete app if the device's version is Android 4.3 or later because android does not allow this feature in version 4.3 and later all versions.
* Introduced new feature for blocking calls on specific time on specific day for each call (Weekends on working days or any other specific day).
* Allowing user to block unknown calls.