Update to use new looper API.

Also need to put back the stub Java class for now, as the
build system still seems to require it.

Change-Id: I31917a1fc7c0bf8cd928969125f94d55c59d42f8

ndk/samples/native-activity/jni/glutils.c

@@ -17,6 +17,8 @@
 
 #include "glutils.h"
 
+#include <string.h>
+
 const char *EGLstrerror(EGLint err) {
     switch (err) {
         case EGL_SUCCESS:           return "EGL_SUCCESS";