add a setting button for managing included folders

app/src/main/AndroidManifest.xml

@@ -96,6 +96,11 @@
             android:configChanges="orientation|keyboardHidden|screenSize"
             android:theme="@style/FullScreenTheme"/>
 
+        <activity
+            android:name=".activities.IncludedFoldersActivity"
+            android:label="@string/include_folders"
+            android:parentActivityName=".activities.SettingsActivity"/>
+
         <activity
             android:name=".activities.ExcludedFoldersActivity"
             android:label="@string/excluded_folders"

app/src/main/kotlin/com/simplemobiletools/gallery/activities/IncludedFoldersActivity.kt

@@ -0,0 +1,11 @@
+package com.simplemobiletools.gallery.activities
+
+import android.os.Bundle
+import com.simplemobiletools.gallery.R
+
+class IncludedFoldersActivity : SimpleActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_included_folders)
+    }
+}

app/src/main/kotlin/com/simplemobiletools/gallery/activities/SettingsActivity.kt

@@ -26,6 +26,7 @@ class SettingsActivity : SimpleActivity() {
         super.onResume()
 
         setupCustomizeColors()
+        setupManageIncludedFolders()
         setupManageExcludedFolders()
         setupShowHiddenFolders()
         setupAutoplayVideos()
@@ -42,6 +43,12 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
+    private fun setupManageIncludedFolders() {
+        settings_manage_included_folders_holder.setOnClickListener {
+            startActivity(Intent(this, IncludedFoldersActivity::class.java))
+        }
+    }
+
     private fun setupManageExcludedFolders() {
         settings_manage_excluded_folders_holder.setOnClickListener {
             startActivity(Intent(this, ExcludedFoldersActivity::class.java))

app/src/main/res/layout/activity_included_folders.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/included_folders_scrollview"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
+
+    <LinearLayout
+        android:id="@+id/included_folders_holder"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"/>
+
+</ScrollView>

app/src/main/res/layout/activity_settings.xml

@@ -30,6 +30,25 @@
 
         </RelativeLayout>
 
+        <RelativeLayout
+            android:id="@+id/settings_manage_included_folders_holder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:background="?attr/selectableItemBackground"
+            android:padding="@dimen/activity_margin">
+
+            <com.simplemobiletools.commons.views.MyTextView
+                android:id="@+id/settings_manage_included_folders"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_centerVertical="true"
+                android:paddingLeft="@dimen/medium_margin"
+                android:paddingStart="@dimen/medium_margin"
+                android:text="@string/manage_included_folders"/>
+
+        </RelativeLayout>
+
         <RelativeLayout
             android:id="@+id/settings_manage_excluded_folders_holder"
             android:layout_width="match_parent"