Migrate KeyWrapUtils

Bring KeyWrapUtils in from GMSCore. This class relies heavily on a set
of protobufs, so this CL includes the creation of the protobuf target
support it and the inclusion of that target in the tests.

Bug: 111386661
Test: atest BackupFrameworksServicesRoboTests
Change-Id: I89e0c68a449f784b132780410d9de32824bb674a