Add security-server.target unit.
Service key-storage requires security-server but it should not use
security-server.socket in Requires field because it's part of private
implementation. This commit creates synchronization point
security-server.target that should be used by other services to add
requirement to security-server.
[Issue#] N/A
[Bug/Cause] N/A
[Problem] key-storage is not able to start because new
security-server does not create security-server.socket.
[Solution] create synchronization point for key-storage
[Verification] Build, install, reboot device.
Change-Id: Id54e9187edf671eec047787bdeb27a8c2acca29e
15 files changed: