(2nd try) Rename {add|remove}UniqueIdAssociation by appending ByPort suffix

Rename InputManager#addUniqueIdAssociation to #addUniqueIdAssociationByPort and
InputManager#removeUniqueIdAssociation to #removeUniqueIdAssociationByPort Test APIs.

This is the second part of the roll-forward of [1], which  was reverted
due to the fact that renaming `addUniqueIdAssociation` testApi caused
conflict when testing on `next` targets. This CL is again renaming
addUniqueIdAssociation to addUniqueIdAssociationByPort, but this
time without any flag to avoid test breakages on `next` targets.

[1] Original CL: I5c65b61652e5f4946d63d8ab7309093e49e65083
[2] Revert CL:   Idd30621950c1e5499efca71daf3e80b20c4097a6

Test: atest FrameworksServicesTests InputTests InputManagerServiceTests
Test: atest libsurfaceflinger_unittest
Fix: 324075859
Signed-off-by: Michael Crimando <mcriman1@ford.com>
Change-Id: I0833431439e12c9a6dad4eae7308eba93b1e7178