Convert the IpSecTransform from being a bi-directional
pair of SAs to a unidirectional single SA. This CL
also removes the concept of "direction from SAs meaning
that a IpSecTransform may now be applied to a socket
in either direction.
-Make transforms unidirectional
-Add Convert allocateSpi() to use destination rather
than direction and remote address
-Remove directionality from builders for IpSecTransform
-Change applyTransportModeTransform() to take a
direction in which to apply the transform object.
-Additional minor naming updates
-Restrict IpSecConfig to only print keys on eng builds
-Move DIRECTION constants to IpSecManager
-Add sourceAddress parameter to IpSecTransform to provide
additional guarantees about the source address of data;
(explicit failure rather than implicit failure).
-Move SPI to the build() method of IpSecTransform
Bug: 71717213
Test: runtest frameworks-net, CTS - IpSecManagerTest
Change-Id: I0824b37f443f4b8c62536d9801238c63ed8f2a1c
5a19b9500d