Connect to activity manager as root.

Before dropping root privileges, connect to the activity manager.
Also, only connect to the activity manager if this is a crash.

Bug: 28210681
(cherry picked from commit 0fc89f34b99f20f0ebc0111df74490f4ebd44076)

Change-Id: Id25b92e550d71ffe1b9eafe43976ef514a83714b
diff --git a/debuggerd/tombstone.h b/debuggerd/tombstone.h
index 2b8b8be..7f3eebe 100644
--- a/debuggerd/tombstone.h
+++ b/debuggerd/tombstone.h
@@ -34,6 +34,6 @@
 /* Creates a tombstone file and writes the crash dump to it. */
 void engrave_tombstone(int tombstone_fd, BacktraceMap* map, pid_t pid, pid_t tid,
                        const std::set<pid_t>& siblings, int signal, int original_si_code,
-                       uintptr_t abort_msg_address);
+                       uintptr_t abort_msg_address, int amfd);
 
 #endif // _DEBUGGERD_TOMBSTONE_H