Add titles, adjust layouts

- Titles for the tutorialFragments: Launcher, Concept, Usage, Setup, 
Let's go
- Adjust `Finish` tab

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

@@ -59,10 +59,12 @@
 
     <androidx.viewpager.widget.ViewPager
         android:id="@+id/tutorial_viewpager"
-        android:layout_width="match_parent"
+        android:layout_width="0dp"
-        android:layout_height="match_parent"
+        android:layout_height="0dp"
-        android:layout_marginTop="64dp"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"
+        app:layout_constraintBottom_toTopOf="@id/tutorial_tabs"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/tutorial_appbar" />
 
     <com.google.android.material.tabs.TabLayout

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

@@ -4,7 +4,21 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/tutorial_concept_container"
+    android:paddingLeft="32sp"
+    android:paddingRight="32sp"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?attr/colorPrimary"
-    tools:context=".tutorial.tab.TutorialFragmentConcept"/>
+    tools:context=".tutorial.tab.TutorialFragmentConcept">
+
+    <TextView
+        android:id="@+id/tutorial_concept_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="Concept"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -5,11 +5,24 @@
     xmlns:custom="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/tutorial_finish_container"
+    android:paddingLeft="32sp"
+    android:paddingRight="32sp"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?attr/colorPrimary"
     tools:context=".tutorial.tab.TutorialFragmentFinish">
 
+    <TextView
+        android:id="@+id/tutorial_finish_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="Let's go!"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
     <TextView
         android:id="@+id/tutorial_finish_text"
         android:layout_width="wrap_content"
@@ -33,6 +46,6 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintVertical_bias="0.6" />
+        app:layout_constraintVertical_bias="0.7" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -7,4 +7,19 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?attr/colorPrimary"
-    tools:context=".tutorial.tab.TutorialFragmentSetup"/>
+    android:paddingLeft="32sp"
+    android:paddingRight="32sp"
+    tools:context=".tutorial.tab.TutorialFragmentSetup">
+
+    <TextView
+        android:id="@+id/tutorial_setup_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="Setup"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -4,7 +4,21 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/tutorial_start_container"
+    android:paddingLeft="32sp"
+    android:paddingRight="32sp"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?attr/colorPrimary"
-    tools:context=".tutorial.tab.TutorialFragmentStart"/>
+    tools:context=".tutorial.tab.TutorialFragmentStart">
+
+    <TextView
+        android:id="@+id/tutorial_start_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="Launcher"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -4,7 +4,21 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/tutorial_usage_container"
+    android:paddingLeft="32sp"
+    android:paddingRight="32sp"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="?attr/colorPrimary"
-    tools:context=".tutorial.tab.TutorialFragmentUsage"/>
+    tools:context=".tutorial.tab.TutorialFragmentUsage">
+
+    <TextView
+        android:id="@+id/tutorial_concept_title2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="Usage"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>