ModuleManager: Load modules from directories

Change-Id: I3a1b720660b068de26ebb002e429fa3c99fa0aef
cmake: Add kmsuriendpointstate.h to installed headers

Change-Id: Iec5c8b26ddfff33dd04bce4718aa46a5a126b1c2
cmake: Install headers for sdp_util

Change-Id: If151d3a41a5c4362e261f48bacea9879a4d75ce5
Change absolute imports for relative imports

Change-Id: Ie336f916037707d211046fbc4809a371115f6109
cmake: Install headers for kmsmediatype

Change-Id: I67fc578e5b36d1d2b1c01b503c6768f1ef84a249