This is a small code clean up in IInputContext, which should have no
observable behavior change for app/IME developers.
In the following two methods we have used IIntResultCallback to return
a boolean value in a synchronous manner by using 0 to represent false
and 1 to represent true.
* IInputContext#requestCursorUpdates
* IInputContext#commitContent
Now that we have IBooleanResultCallback, we can just use true and
false without any conversion.
Bug: 192412909
Test: presubmit
Change-Id: Id6beaf3c9350b70138eb77f406be86fe2c8b679f
14add1cb74