Wireless display option should be in the settings straight away so it isn't in a sub-categories. If I remember correctly it is the 3rd one down.
I rebooted and all of above apps including WirelessDisplay were gone from Xolo.
I did adb push again but non of them get installed via adb push method this time and so I had to manually install each .apk by tapping it and let system install it.
However this time WirelessDisplay did not install, neither by adb push nor by tapping the .apk
Any clue about why these ones got removed automatically post reboot? Why WiDi is not reinstalling again?