external/connectivity: Modify Android.mk to compile all make files

The current Android.mk in external/connectivity calls only all its subdir
make one level below it which causing cnd/ref-cne is not get compiled. Modify
this file to compile all make files.

Change-Id: Iff0d21c599b741daf5777a9910be7f9f6c0d59e8
CRs-fixed: 263910
1 file changed
tree: 02fde8ed5829389524db43ff4ca876297a9dbde0
  1. cnd/
  2. include/
  3. reference-cne/
  4. stlport/
  5. Android.mk