Refactor conference participant processing. am: f190b8227e

Change-Id: Ia20da60f634b06afbc4828af15684c9ee26fec5f
tree: 5d4f2300a5d56fa8ee64b8efdc479bff1aa3c297
  1. src/
  2. tests/
  3. Android.bp
  4. CleanSpec.mk
  5. OWNERS
  6. README.txt
  7. TEST_MAPPING