Command emulate android after LiveSync starts the last synced app on the emulator

[vchimev]

Summary:

In the scenario when you use livesync command and then emulate android (or its equivalent run android --emulator), the last synced version of the app is started instead of its current.

Steps to reproduce (make a change in the app between each step to see if it is applied or not):

tns emulate android
tns livesync android
tns emulate android

or

tns run android --emulator
tns livesync android
tns run android --emulator

Workaround:

Use tns run android command without --emulator option when the emulator is already running after usage of the livesync command.

Related issues:
#896
#943