init shouldn't call DumpState by default.

The cost of generating and throwing away a bunch of stuff that no one
normally sees is high enough to be worth avoiding.

Here's AOSP ToT on N9...

 init: (Parsing /system/etc/init/atrace.rc took 0.0112s.)
 init: (Parsing /system/etc/init/bootanim.rc took 0.0094s.)
 init: (Parsing /system/etc/init/crash_reporter.rc took 0.0103s.)
 init: (Parsing /system/etc/init/debuggerd.rc took 0.0090s.)
 init: (Parsing /system/etc/init/debuggerd64.rc took 0.0085s.)
 init: (Parsing /system/etc/init/drmserver.rc took 0.0078s.)
 init: (Parsing /system/etc/init/dumpstate.rc took 0.0073s.)
 init: (Parsing /system/etc/init/gatekeeperd.rc took 0.0063s.)
 init: (Parsing /system/etc/init/installd.rc took 0.0067s.)
 init: (Parsing /system/etc/init/keystore.rc took 0.0060s.)
 init: (Parsing /system/etc/init/lmkd.rc took 0.0060s.)
 init: (Parsing /system/etc/init/logcatd.rc took 0.0059s.)
 init: (Parsing /system/etc/init/logd.rc took 0.0068s.)
 init: (Parsing /system/etc/init/mdnsd.rc took 0.0057s.)
 init: (Parsing /system/etc/init/mediaserver.rc took 0.0064s.)
 init: (Parsing /system/etc/init/metrics_daemon.rc took 0.0063s.)
 init: (Parsing /system/etc/init/mtpd.rc took 0.0055s.)
 init: (Parsing /system/etc/init/netd.rc took 0.0066s.)
 init: (Parsing /system/etc/init/perfprofd.rc took 0.0057s.)
 init: (Parsing /system/etc/init/racoon.rc took 0.0054s.)
 init: (Parsing /system/etc/init/rild.rc took 0.0061s.)
 init: (Parsing /system/etc/init/servicemanager.rc took 0.0063s.)
 init: (Parsing /system/etc/init/surfaceflinger.rc took 0.0061s.)
 init: (Parsing /system/etc/init/uncrypt.rc took 0.0068s.)
 init: (Parsing /system/etc/init/vdc.rc took 0.0065s.)
 init: (Parsing /system/etc/init/vold.rc took 0.0063s.)

0.0112+0.0094+0.0103+0.0090+0.0085+0.0078+0.0073+0.0063+0.0067+0.0060+
0.0060+0.0059+0.0068+0.0057+0.0064+0.0063+0.0055+0.0066+0.0057+0.0054+
0.0061+0.0063+0.0061+0.0068+0.0065+0.0063 = 0.1809

And here it is again with the logging disabled:

 init: (Parsing /system/etc/init/atrace.rc took 0.0021s.)
 init: (Parsing /system/etc/init/bootanim.rc took 0.0006s.)
 init: (Parsing /system/etc/init/crash_reporter.rc took 0.0007s.)
 init: (Parsing /system/etc/init/debuggerd.rc took 0.0004s.)
 init: (Parsing /system/etc/init/debuggerd64.rc took 0.0005s.)
 init: (Parsing /system/etc/init/drmserver.rc took 0.0005s.)
 init: (Parsing /system/etc/init/dumpstate.rc took 0.0005s.)
 init: (Parsing /system/etc/init/gatekeeperd.rc took 0.0005s.)
 init: (Parsing /system/etc/init/installd.rc took 0.0005s.)
 init: (Parsing /system/etc/init/keystore.rc took 0.0013s.)
 init: (Parsing /system/etc/init/lmkd.rc took 0.0006s.)
 init: (Parsing /system/etc/init/logcatd.rc took 0.0013s.)
 init: (Parsing /system/etc/init/logd.rc took 0.0007s.)
 init: (Parsing /system/etc/init/mdnsd.rc took 0.0005s.)
 init: (Parsing /system/etc/init/mediaserver.rc took 0.0009s.)
 init: (Parsing /system/etc/init/metrics_daemon.rc took 0.0008s.)
 init: (Parsing /system/etc/init/mtpd.rc took 0.0011s.)
 init: (Parsing /system/etc/init/netd.rc took 0.0005s.)
 init: (Parsing /system/etc/init/perfprofd.rc took 0.0005s.)
 init: (Parsing /system/etc/init/racoon.rc took 0.0005s.)
 init: (Parsing /system/etc/init/rild.rc took 0.0005s.)
 init: (Parsing /system/etc/init/servicemanager.rc took 0.0005s.)
 init: (Parsing /system/etc/init/surfaceflinger.rc took 0.0005s.)
 init: (Parsing /system/etc/init/uncrypt.rc took 0.0005s.)
 init: (Parsing /system/etc/init/vdc.rc took 0.0005s.)
 init: (Parsing /system/etc/init/vold.rc took 0.0006s.)

0.0021+0.0006+0.0007+0.0004+0.0005+0.0005+0.0005+0.0005+0.0005+0.0013+
0.0006+0.0013+0.0007+0.0005+0.0009+0.0008+0.0011+0.0005+0.0005+0.0005+
0.0005+0.0005+0.0005+0.0005+0.0005+0.0006 = 0.0181

It's less than a second, but one problem is that the cost of the current
dumping is proportional to the number of init.rc files, so the more
cleanly you factor things, the more it would cost.

Change-Id: Id96f59e7d0b082d8cfdba4bdbff43a922ba4eeee