Fix NanoSleep and add test

Fixed a bug where tv_nsec was't between 0 and 999,999,999.

(cherry picked from commit 0b063d9ba7a11779667c0888e9f3495de0118b74)

Bug: 14450052
Change-Id: I30b29a716bfa63c6b57d589dd1102d2ca934c061
diff --git a/runtime/utils.cc b/runtime/utils.cc
index e18af00..650214f 100644
--- a/runtime/utils.cc
+++ b/runtime/utils.cc
@@ -262,8 +262,8 @@
 
 void NanoSleep(uint64_t ns) {
   timespec tm;
-  tm.tv_sec = 0;
-  tm.tv_nsec = ns;
+  tm.tv_sec = ns / MsToNs(1000);
+  tm.tv_nsec = ns - static_cast<uint64_t>(tm.tv_sec) * MsToNs(1000);
   nanosleep(&tm, nullptr);
 }