dumpstate: assert no process ptrace

dumpstate has CAP_SYS_PTRACE solely for the purpose of reading sensitive
/proc/PID files, not for using ptrace attach. Add an assert to ensure
that's the case.

Test: policy compiles.
Change-Id: I975308fae3f8e9a039b9efdc0e9605192b405ce7
1 file changed