When vold mounts the encrypted /data partition, it first checks for and
kills processes that have open fds to the tmpfs placeholder at /data.
This resulted in a 20 second boot-time regression (vold's timeout period)
when tombstoned was started before vold.
Bug: http://b/34461270
Test: boot is faster, no messages from vold in console spew
Test: tombstoned still started by init
Change-Id: Ib5e9ddb05f40c9da852f00e103861c6ff2d94888
Remove debuggerd in favor of a helper process that gets execed by
crashing processes.
Bug: http://b/30705528
Test: debuggerd_test
Change-Id: I9906c69473989cbf7fe5ea6cccf9a9c563d75906