Remove unused arguments of InputMethodManagerService

Previously, we were passing arguments like lastToolType, resultReceiver and also sent flags to the InputMethodService. These are not used anymore, therefore this CL cleans up those arguments.

Fix: 419459695
Test: atest CtsInputMethodTestCases
Test: atest FrameworksInputMethodSystemServerTests
Flag: EXEMPT refactor
Change-Id: Id2597b070df1391019900057cb4b9901c60193c8