Implemented CancellationSignal for augmented autofill requests.

Fixes: 122728762
Bug: 127062800
Test: atest android.autofillservice.cts.augmented.AugmentedLoginActivityTest#testCancellationSignalCalledAfterTimeout
Change-Id: Id6f0d6f5ac4e47b07e32c255fdbb02af878b6921
4 files changed