Plumb tombstoned connections through PALette.

This removes APEX internal dependencies on libtombstoned_client and
libcutils.

Test: art/build/apex/runtests.sh
Test: adb shell killall -QUIT system_server; check tombstoned report in /data/anr
Test: Make /data nearly full; adb shell killall -QUIT system_server; check
  that the report in /data/anr has zero length and that the stack traces are
  sent to logcat instead
Bug: 130025619
Change-Id: I93dae3729c0e4de9e32b942e6c85915b56d8114a
9 files changed