Make an engines that is available (appears on the list returned by getAvailableEngines) active.
After this call, the engine will be added to the list of engines loaded in the IME daemon and the
input sent using sendKeys will be converted by the active engine. Note that this is a
platform-independent method of activating IME (the platform-specific way being using keyboard shortcuts.
This command is deprecated and will be removed soon. Make sure you don’t use it in your
automation/test scripts anymore to avoid errors.
||Name of the engine to activate.