Ring Scheduler description

Are you still manually turning on airplane mode at night and off in the morning everyday? Are you still manually turning on silent mode before a meeting and off after every time? It's time to go automatic!

New permissions:
* Modify USB storage: To save data files (and then to restore).
* Read contact data: To pick contact and display contact name in blacklist.
* Directly call phone numbers: To do blacklist blocking(end call).