Retain monitoring configuration on service restart, identify beacon parsers

New Features:

• Retains monitored regions across service restarts, preventing apps from getting multiple region entry callbacks each time the service restarts.
• Add string identifier to BeaconParser which can be referenced by decoded Beacon object, allowing easy determination of beacon type.
• Switch to using ELAPSED_REALTIME clocks, so scanning doesn't stop on devices without a battery-backed RTC
• Add ability to access raw EDDYSTONE_TLM data for sending info to Google services.
• New distance formula for Moto X Pro

Bug Fixes:

• Multiple consumers of the BeaconService will now each get a onBeaconServiceConnected() callback.
• Don't scan for bluetooth devices if permission has not been granted in Android 6. This prevents large number of exceptions in the log.