Add NS_R_INTERNAL_ERROR item into NsRcode in stats.proto

Bug: 119862317
Test: ./out/host/linux-x86/bin/statsd_testdrive 116

Merged-In: I3521a429d9cec8281d89e6e83419a151af7b81b6
Merged-In: I0cf28032f8079c64253ed3f90fcf9d4705a5b492
(cherry picked from commit 63925b5a5e6e71ee31fe3fc902f4711ba73522d3)

Change-Id: Ice31090cfe77cfb3bab75049dfaac6ebfaef290d
1 file changed