Merge changes I34de4baf,Ie2b4593d,I4b84a9e1,I664b55d3,I60381a25

* changes:
  Manually merge JniConstants changes from 81fd7cc0.
  Add Calendar, Object, Object[] to well-known list
  Add InputStream and OutputStream to the well-known classes.
  Fix build. JniConstants is in libnativehelper, not libcore, in dalvik-dev.
  Moving libnativehelper additions from libcore