Fix issues in call status text

Test Cases: A call B, B onhook ,B goes to alerting,B pickup connected A call B via internal number (like 4444) ,B is busy in another call .A gets disconnected B will be in call. A call B ,B is busy in another call .A gets disconnected B will be in call. A calls B,B is Offhook ,A goes to disconnected A calls B, B get alerting status when ringing A calls B, B doesnt answer .A goes to disconnected ,B goes to idle after alerting state. A initiates 3 party call for B ,C .B leave ,A and C in connected ,C leaves ,A will be disconnected state A calls B and A add C in R4 call.A press flash+4 and goes disconnected.B and C remain in connected state.