[0815][refactoring](LG,RB) deleted old xml files
[0815][refactoring] refactored classes in database package
[0815][refactoring](LG,RB) refactored
[0815][refactoring](LG,RB) refactored activity_offerride.xml and ActivityOfferRide.java
[0815][refactoring](LG,RB) refactored activity_check_trip.xml
[0815][refactoring](LG,RB) refactored ActivityCheckTrip.java
[0815][refactoring](LG,RB) refactored ActivityGetRide.java and activity_getride.xml