Apply ResultCallback to isImeTraceEnabled

With CL[1], the isImeTraceEnabled in InputMethodManager
require to use ResultCallback mechanism. Change this API
usage in DevelopmentTiles.

[1] : I1547b98b2aacf764e33aadc9ab784f2013f58f2f

Bug: 163453493
Test: make RunSettingsRoboTests ROBOTEST_FILTER="WinscopeTraceTest"
Change-Id: I767069892c713023b064525105ef2b55946b7bb8