charger: new thresholds for stop-charging and resume-charging as the device is...

charger: new thresholds for stop-charging and resume-charging as the device is locked in retail mode

The following thresholds will be applied to the case of retail mode
1. stop-charging at 47 degC
2. resume-charging at 45 degC

Change-Id: I1480b8ad1d2b27e17e16f83d5a0bae61fbe3e9cc