composer: make PresentOrValidate.Result consistent with hidl

HIDL expects that Presented will be 1 and Validated witll be 0.
Even though we map the enum values of PresentOrValidate.Result
to the correct value, this CL makes the interface consistent with
the HIDL so that we can directly use the enum value.

Bug: 208856704
Test: VTS
Change-Id: I9fb2421e32c2288c5495422eda6764f6102337f0