Updating Trusted Device Enrollment API

(1) Store device mac address and handle in service side
(2) Update API to directly get handle and mac address string from
service

Bug: 129552708
Test: Build and flash
Change-Id: I5a835058f103d25bf518b20fc3dc7f7e141e0787
(cherry picked from commit 0c5e6fc50b689a4385763f4464ffb3f9827febba)
7 files changed