TouchInputMapper: remove unnecessary dispatchMotion parameters

Since the pointer gestures code was removed, the source, xPrecision,
yPrecision, downTime, and classification parameters were the same at
every call site, so they can be removed.

Bug: 281840344
Test: $ atest --host inputflinger_tests
Flag: EXEMPT refactor
Change-Id: I5ca68bed5c7b58aa7c95250a34879744c9801c36