Merge changes from topic "schuffelen-cf-2019-11-19-composite"

* changes:
  Always assume a composite disk.
  Always assume there is a ramdisk present.
tree: 3696944d32737d6dc1dca5166a71bc7101fe6aa5
  1. common/
  2. guest/
  3. host/
  4. tests/
  5. tools/
  6. Android.bp
  7. Android.mk
  8. OWNERS
  9. TEST_MAPPING