Change the NDK samples package names to be lower case. Also added minSdkVersion=3 in the manifests.

ndk/sources/samples/two-libs/second.c

@@ -2,10 +2,10 @@
 #include <jni.h>
 
 jint
-Java_com_example_TwoLib_TwoLib_add( JNIEnv*  env,
-                                    jobject  this,
-                                    jint     x,
-                                    jint     y )
+Java_com_example_twolibs_TwoLibs_add( JNIEnv*  env,
+                                      jobject  this,
+                                      jint     x,
+                                      jint     y )
 {
     return first(x, y);
 }