在Android NDK中使用两个共享库并支持RTTI和动态转型是可能的。下面是一个解决方案的代码示例：

首先，需要在Android.mk文件中添加相关的配置信息：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

# 配置第一个共享库
LOCAL_MODULE := first_lib
LOCAL_SRC_FILES := first_lib.cpp
LOCAL_CPP_FEATURES += exceptions rtti
# 添加其他需要的编译选项

include $(BUILD_SHARED_LIBRARY)

# 配置第二个共享库
include $(CLEAR_VARS)

LOCAL_MODULE := second_lib
LOCAL_SRC_FILES := second_lib.cpp
LOCAL_CPP_FEATURES += exceptions rtti
# 添加其他需要的编译选项

include $(BUILD_SHARED_LIBRARY)

接下来，需要确保在C++代码中正确使用RTTI和动态转型。下面是一个简单的示例：

first_lib.cpp：

#include 

class Base {
public:
    virtual void print() {
        std::cout << "Base class" << std::endl;
    }
};

class Derived : public Base {
public:
    void print() override {
        std::cout << "Derived class" << std::endl;
    }
};

extern "C" {
JNIEXPORT void JNICALL Java_com_example_myapplication_MainActivity_testDynamicCast(JNIEnv* env, jobject obj) {
    Base* base = new Derived();
    Derived* derived = dynamic_cast(base);
    if (derived) {
        derived->print();
    } else {
        std::cout << "Dynamic cast failed" << std::endl;
    }
    delete base;
}
}

second_lib.cpp：

#include 

class SecondLibClass {
public:
    void print() {
        std::cout << "SecondLibClass" << std::endl;
    }
};

extern "C" {
JNIEXPORT void JNICALL Java_com_example_myapplication_MainActivity_testRtti(JNIEnv* env, jobject obj) {
    SecondLibClass secondLibObj;
    const std::type_info& typeInfo = typeid(secondLibObj);
    std::cout << "Type: " << typeInfo.name() << std::endl;
}
}

最后，在Java代码中调用这些函数：

public class MainActivity extends AppCompatActivity {
    static {
        System.loadLibrary("first_lib");
        System.loadLibrary("second_lib");
    }

    public native void testDynamicCast();
    public native void testRtti();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        testDynamicCast();
        testRtti();
    }
}

这样，就可以在Android NDK中使用两个共享库并支持RTTI和动态转型了。请根据实际需求进行修改和调整。