Adds CarTrustAgentClientApp as test app for trust agent

Bug: 111192659
Test: m -j CarTrustAgentClient
Change-Id: Ic075bc44fc192157cf323a806e1fcd1063411666
Merged-In: Ic075bc44fc192157cf323a806e1fcd1063411666
(cherry picked from commit f7a9b9a878a68638bb07470f70177aee47f580d0)
10 files changed