Modified DeviceManagerService to return operation status.
Added updateDeviceInfo method to DeviceManagerService.
Android-REST API implementation.
Merge branch 'master' of https://github.com/geethkokila/product-cdm

Conflicts:
	components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dto/Device.java