Using ImeTracing instead of IInputMethodManager so we
can get rid of the direct dependency between Settings
DevelopmentTiles and IInputMethodManager.
Bug: 175742251
Test: Manually test ime winscope works properly
Test: make RunSettingsRoboTests ROBOTEST_FILTER="WinscopeTraceTest"
Change-Id: I87e6e841a50b671b7f99c7afff562f3b9a6e3db9