Refactor: Clean up unused and incorrect imports

This commit removes unused `androidx.core.view.WindowCompat` imports from a large number of activities.

Additionally, it corrects the import order in `EdgeToEdgeHelper.java` and removes an unused `ActivityOnboardingBinding` import from `MainActivity.java`.

Author: MihaiCristianCondrea

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/CodeActivity.java

@@ -3,7 +3,6 @@
 import android.os.Bundle;
 
 import androidx.annotation.NonNull;
-import androidx.core.view.WindowCompat;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.viewpager2.adapter.FragmentStateAdapter;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/alerts/alertdialog/AlertDialogActivity.java

@@ -5,8 +5,6 @@
 import android.os.Handler;
 import android.os.Looper;
 
-import androidx.core.view.WindowCompat;
-
 import com.d4rk.androidtutorials.java.R;
 import com.d4rk.androidtutorials.java.databinding.ActivityAlertDialogBinding;
 import com.d4rk.androidtutorials.java.ui.components.navigation.UpNavigationActivity;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/alerts/snackbar/SnackBarActivity.java

@@ -5,8 +5,6 @@
 import android.os.Handler;
 import android.os.Looper;
 
-import androidx.core.view.WindowCompat;
-
 import com.d4rk.androidtutorials.java.R;
 import com.d4rk.androidtutorials.java.databinding.ActivitySnackBarBinding;
 import com.d4rk.androidtutorials.java.ui.components.navigation.UpNavigationActivity;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/alerts/toast/ToastActivity.java

@@ -6,8 +6,6 @@
 import android.os.Looper;
 import android.widget.Toast;
 
-import androidx.core.view.WindowCompat;
-
 import com.d4rk.androidtutorials.java.R;
 import com.d4rk.androidtutorials.java.databinding.ActivityToastBinding;
 import com.d4rk.androidtutorials.java.ui.components.navigation.UpNavigationActivity;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/basics/history/AndroidHistory.java

@@ -2,8 +2,6 @@
 
 import android.os.Bundle;
 
-import androidx.core.view.WindowCompat;
-
 import com.d4rk.androidtutorials.java.ads.AdUtils;
 import com.d4rk.androidtutorials.java.databinding.ActivityAndroidHistoryBinding;
 import com.d4rk.androidtutorials.java.ui.components.navigation.UpNavigationActivity;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/basics/permissions/PermissionsTutorialActivity.java

@@ -4,8 +4,6 @@
 import android.net.Uri;
 import android.os.Bundle;
 
-import androidx.core.view.WindowCompat;
-
 import com.d4rk.androidtutorials.java.ads.AdUtils;
 import com.d4rk.androidtutorials.java.databinding.ActivityPermissionsTutorialBinding;
 import com.d4rk.androidtutorials.java.ui.components.navigation.UpNavigationActivity;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/basics/sdk/AndroidSDK.java

@@ -7,8 +7,6 @@
 import android.widget.TableRow;
 import android.widget.TextView;
 
-import androidx.core.view.WindowCompat;
-
 import com.d4rk.androidtutorials.java.ads.AdUtils;
 import com.d4rk.androidtutorials.java.data.model.AndroidVersion;
 import com.d4rk.androidtutorials.java.databinding.ActivityAndroidSdkBinding;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/basics/shortcuts/ShortcutsActivity.java

@@ -4,7 +4,6 @@
 import android.net.Uri;
 import android.os.Bundle;
 
-import androidx.core.view.WindowCompat;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
 

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/basics/shortcuts/tabs/ShortcutsCategoryActivity.java

@@ -9,7 +9,6 @@
 import com.d4rk.androidtutorials.java.ads.AdUtils;
 import com.d4rk.androidtutorials.java.ui.components.navigation.UpNavigationActivity;
 import com.d4rk.androidtutorials.java.utils.EdgeToEdgeHelper;
-
 import com.google.android.gms.ads.AdView;
 
 import me.zhanghai.android.fastscroll.FastScrollScrollView;

app/src/main/java/com/d4rk/androidtutorials/java/ui/screens/android/lessons/basics/viewbinding/ViewBindingTutorialActivity.java

@@ -7,7 +7,6 @@
 import android.os.Bundle;
 import android.util.Log;
 
-import androidx.core.view.WindowCompat;
 import androidx.preference.PreferenceManager;
 
 import com.d4rk.androidtutorials.java.R;