Bug/dream11 null device

[CTLalit]

https://wizrocket.atlassian.net/browse/SDK-3671

• fixed init of variables in class first before using them in deviceInfo
• did not use device id from state variable (shared pref map)
• instead passed device id back from func as it is created on fly
• this reduces risk of state variable changing over time as it is accessed in future
• simplified ternary as it would always return null in both cases
• the device id passed as method return type to be used
• did not fetch device id from state (shared pref map)