Comprehensive cleanup of imports and includes across NDK samples

* Optimized C++ includes and modernized headers across multiple modules (camera, gles, teapots, vectorization).
* Cleaned up unused and redundant Java/Kotlin imports in all sample applications.
* Standardized header guards and include patterns for better compilation performance and consistency.
* Removed deprecated annotations and unused resource references.

Author: Jake-The-Human

base/src/main/cpp/logging_splitters.h

@@ -16,8 +16,8 @@
 
 #pragma once
 
-#include <inttypes.h>
-#include <time.h>
+#include <cinttypes>
+#include <ctime>
 
 #include <format>
 

bitmap-plasma/app/src/main/cpp/plasma.cpp

@@ -17,10 +17,10 @@
 #include <android/bitmap.h>
 #include <android/log.h>
 #include <jni.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
+#include <cmath>
+#include <cstdio>
+#include <cstdlib>
+#include <ctime>
 
 #define LOG_TAG "libplasma"
 #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)

bitmap-plasma/app/src/main/java/com/example/plasma/Plasma.java

@@ -17,14 +17,13 @@
 
 import android.annotation.SuppressLint;
 import android.app.Activity;
-import android.graphics.Point;
-import android.os.Bundle;
 import android.content.Context;
-import android.view.View;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
+import android.graphics.Point;
+import android.os.Bundle;
 import android.view.Display;
-import android.view.WindowManager;
+import android.view.View;
 
 public class Plasma extends Activity
 {

camera/basic/src/main/cpp/camera_engine.h

@@ -63,7 +63,7 @@ class CameraEngine {
   int GetDisplayRotation(void);
 
   struct android_app* app_;
-  ImageFormat savedNativeWinRes_;
+  ImageFormat savedNativeWinRes_{};
   bool cameraGranted_;
   int rotation_;
   volatile bool cameraReady_;

camera/basic/src/main/cpp/camera_manager.cpp

@@ -35,7 +35,7 @@ static const int64_t kMaxExposureTime = 250000000;
 
 NDKCamera::NDKCamera()
     : cameraMgr_(nullptr),
-      activeCameraId_(""),
+      activeCameraId_(),
       cameraFacing_(ACAMERA_LENS_FACING_BACK),
       cameraOrientation_(0),
       outputContainer_(nullptr),

camera/basic/src/main/cpp/camera_manager.h

@@ -77,7 +77,7 @@ class NDKCamera {
   std::vector<CaptureRequestInfo> requests_;
 
   ACaptureSessionOutputContainer* outputContainer_;
-  ACameraCaptureSession* captureSession_;
+  ACameraCaptureSession* captureSession_{};
   CaptureSessionState captureSessionState_;
 
   // set up exposure control

camera/texture-view/src/main/cpp/camera_engine.h

@@ -48,6 +48,6 @@ class CameraAppEngine {
   int32_t requestHeight_;
   jobject surface_;
   NDKCamera* camera_;
-  ImageFormat compatibleCameraRes_;
+  ImageFormat compatibleCameraRes_{};
 };
 #endif  // __CAMERA_ENGINE_H__

camera/texture-view/src/main/cpp/camera_manager.cpp

@@ -37,7 +37,7 @@ static const uint64_t kMaxExposureTime = static_cast<uint64_t>(250000000);
 
 NDKCamera::NDKCamera()
     : cameraMgr_(nullptr),
-      activeCameraId_(""),
+      activeCameraId_(),
       cameraFacing_(ACAMERA_LENS_FACING_BACK),
       cameraOrientation_(0),
       outputContainer_(nullptr),

camera/texture-view/src/main/cpp/camera_manager.h

@@ -87,7 +87,7 @@ class NDKCamera {
   std::vector<CaptureRequestInfo> requests_;
 
   ACaptureSessionOutputContainer* outputContainer_;
-  ACameraCaptureSession* captureSession_;
+  ACameraCaptureSession* captureSession_{};
   CaptureSessionState captureSessionState_;
 
   // set up exposure control

exceptions/app/src/main/java/com/example/exceptions/MainActivity.kt

@@ -2,7 +2,6 @@ package com.example.exceptions
 
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
-import android.widget.TextView
 import com.example.exceptions.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {