tree e2e459cadb065bce0f7b6bdd581a0b4a2c989b2e
parent cf9bc5fd7558f3806b91b15db6a733f2785c7fa4
author Connor O'Brien <connoro@google.com> 1559782992 -0700
committer Connor O'Brien <connoro@google.com> 1561075405 -0700

libtimeinstate: use std::optional

Simplify the interface and implementation of libtimeinstate by using
std::optional instead of output parameters.

Test: libtimeinstate_test passes
Bug: 78498733
Change-Id: I97b697c9b51c31245b3c141eff063eba865f5d73
Signed-off-by: Connor O'Brien <connoro@google.com>