feat: 切换后端至PaddleOCR-NCNN，切换工程为CMake

1.项目后端整体迁移至PaddleOCR-NCNN算法，已通过基本的兼容性测试
2.工程改为使用CMake组织，后续为了更好地兼容第三方库，不再提供QMake工程
3.重整权利声明文件，重整代码工程，确保最小化侵权风险

Log: 切换后端至PaddleOCR-NCNN，切换工程为CMake
Change-Id: I4d5d2c5d37505a4a24b389b1a4c5d12f17bfa38c

3rdparty/opencv-4.5.4/samples/android/tutorial-4-opencl/res/layout/activity.xml

@@ -0,0 +1,26 @@
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" >
+
+    <org.opencv.samples.tutorial4.MyGLSurfaceView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/my_gl_surface_view" />
+
+    <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation = "vertical" >
+	    <TextView
+	        android:layout_width="wrap_content"
+	        android:layout_height="wrap_content"
+	        android:id="@+id/fps_text_view"
+	        android:text="FPS:" />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:id="@+id/proc_mode_text_view"
+            android:text="Processing mode:" />
+	    </LinearLayout>
+
+</FrameLayout>

3rdparty/opencv-4.5.4/samples/android/tutorial-4-opencl/res/menu/menu.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android" >
+    <group android:checkableBehavior="single">
+        <item android:id="@+id/no_proc" android:title="No processing" />
+        <item android:id="@+id/cpu" android:title="Use CPU code" />
+        <item android:id="@+id/ocl_direct" android:title="Use OpenCL direct" />
+        <item android:id="@+id/ocl_ocv" android:title="Use OpenCL via OpenCV" />
+    </group>
+</menu>

3rdparty/opencv-4.5.4/samples/android/tutorial-4-opencl/res/values/strings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">OpenCV Tutorial 4 - Use OpenCL</string>
+
+</resources>