tree e77c38fe273c25da47e3317f1afc92f1ecce97fb
parent 691e0e154ad3d666bcd3fb6d21c563700a31ff2f
author Tom Cherry <tomcherry@google.com> 1558050889 -0700
committer Tom Cherry <tomcherry@google.com> 1558563781 -0700

init: replace Result<> with expected<>

Android-base has an implementation of the future std::expected<>.
This provides the same baseline functionality as Result<>, so use it
instead of our own version.

Bug: 132145659
Test: boot, init unit tests
Change-Id: I11e61bcb5719b262a6420483ed51a762826a9e23