Fragments must be public classes

Otherwise they crash at runtime when launched

AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.kde.kdeconnect_tp"
-    android:versionCode="11100"
+    android:versionCode="11102"
     android:versionName="1.11">
 
     <supports-screens

src/org/kde/kdeconnect/UserInterface/PluginPreference.java

@@ -12,7 +12,7 @@ import androidx.annotation.NonNull;
 import androidx.preference.CheckBoxPreference;
 import androidx.preference.PreferenceViewHolder;
 
-class PluginPreference extends CheckBoxPreference {
+public class PluginPreference extends CheckBoxPreference {
     private final Device device;
     private final String pluginKey;
     private final View.OnClickListener listener;

src/org/kde/kdeconnect/UserInterface/SettingsFragment.java

@@ -22,7 +22,7 @@ import androidx.preference.PreferenceScreen;
 import androidx.preference.SwitchPreferenceCompat;
 import androidx.preference.TwoStatePreference;
 
-class SettingsFragment extends PreferenceFragmentCompat {
+public class SettingsFragment extends PreferenceFragmentCompat {
 
     private MainActivity mainActivity;
     private EditTextPreference renameDevice;