Fix oppia#4735 Text unit is set in dp instead of sp (oppia#5134)

## Explanation
Fix oppia#4735 , Added toolbar in admin_pin_activity xml file inorder to
control the title size using sp.

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## Essential Checklist
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- [x] The PR title and explanation each start with "Fix #bugnum: " (If
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## For UI-specific PRs only

Before fix
Admin pin activity
| Light mode| 
|--------|
|![before
light](https://github.com/oppia/oppia-android/assets/76042077/e80cd747-b04c-43c5-96b9-848dc5db3400)
|

After fix
|Light mode| Dark mode|
|-----------|--------------|
|
![afterlightmode](https://github.com/oppia/oppia-android/assets/76042077/4445ebd1-3fde-40f4-a4cb-cb3716aad43e)
|
![afterdarkmode](https://github.com/oppia/oppia-android/assets/76042077/98bd0994-5f4d-464f-b170-d21e167a9eaa)
|

Co-authored-by: Adhiambo Peres <[email protected]>

app/src/main/AndroidManifest.xml

@@ -138,6 +138,7 @@
     <activity
       android:name=".app.profile.AdminPinActivity"
       android:label="@string/admin_pin_activity_title"
+      android:theme="@style/OppiaThemeWithoutActionBar"
       android:windowSoftInputMode="adjustResize" />
     <activity
       android:name=".app.profile.PinPasswordActivity"

app/src/main/java/org/oppia/android/app/profile/AdminPinActivity.kt

@@ -3,6 +3,8 @@ package org.oppia.android.app.profile
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.appcompat.widget.Toolbar
+import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.model.ScreenName.ADMIN_PIN_ACTIVITY
@@ -38,6 +40,9 @@ class AdminPinActivity : InjectableAutoLocalizedAppCompatActivity() {
     super.onCreate(savedInstanceState)
     (activityComponent as ActivityComponentImpl).inject(this)
     adminPinActivityPresenter.handleOnCreate()
+
+    val toolbar: Toolbar = findViewById(R.id.admin_pin_toolbar)
+    setSupportActionBar(toolbar)
   }
 
   override fun onSupportNavigateUp(): Boolean {

app/src/main/java/org/oppia/android/app/profile/AdminPinActivityPresenter.kt

@@ -38,18 +38,22 @@ class AdminPinActivityPresenter @Inject constructor(
 
   /** Binds ViewModel and sets up text and button listeners. */
   fun handleOnCreate() {
-    activity.supportActionBar?.setDisplayHomeAsUpEnabled(true)
-    activity.supportActionBar?.setHomeAsUpIndicator(R.drawable.ic_close_white_24dp)
-    activity.supportActionBar?.setHomeActionContentDescription(R.string.admin_auth_close)
 
     val binding =
       DataBindingUtil.setContentView<AdminPinActivityBinding>(activity, R.layout.admin_pin_activity)
 
+    activity.setSupportActionBar(binding.adminPinToolbar)
+    activity.supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    activity.supportActionBar?.setHomeAsUpIndicator(R.drawable.ic_close_white_24dp)
+    activity.supportActionBar?.setHomeActionContentDescription(R.string.admin_auth_close)
+
     binding.apply {
       lifecycleOwner = activity
       viewModel = adminViewModel
     }
 
+    binding.adminPinToolbar.title = resourceHandler
+      .getStringInLocale(R.string.admin_auth_activity_add_profiles_title)
     // [onTextChanged] is a extension function defined at [TextInputEditTextHelper]
     binding.adminPinInputPinEditText.onTextChanged { pin ->
       pin?.let {

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

@@ -13,14 +13,32 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
+
+    <androidx.appcompat.widget.Toolbar
+      android:id="@+id/admin_pin_toolbar"
+      android:layout_width="match_parent"
+      android:layout_height="wrap_content"
+      android:minHeight="?attr/actionBarSize"
+      android:elevation="4dp"
+      android:theme="@style/OppiaActionBarTheme"
+      style="@style/AdminPinToolbarTextAppearance"
+      app:titleTextAppearance="@style/AdminPinToolbarTextAppearance"
+      app:titleTextColor="@color/component_color_shared_activity_toolbar_text_color"
+      app:layout_constraintTop_toTopOf="parent" />
+
     <androidx.core.widget.NestedScrollView
       android:id="@+id/scrollViewAdminPin"
-      android:layout_width="match_parent"
-      android:layout_height="match_parent"
-      android:background="@color/component_color_shared_screen_secondary_background_color"
+      android:layout_width="@dimen/admin_auth_activity_layout_width"
+      android:layout_height="0dp"
       android:fillViewport="true"
       android:overScrollMode="never"
-      android:scrollbars="none">
+      android:scrollbars="none"
+      android:background="@color/component_color_shared_screen_secondary_background_color"
+      app:layout_constraintBottom_toBottomOf="parent"
+      app:layout_constraintEnd_toEndOf="parent"
+      app:layout_constraintStart_toStartOf="parent"
+      app:layout_constraintTop_toBottomOf="@id/admin_pin_toolbar"
+      >
 
       <androidx.constraintlayout.widget.ConstraintLayout
         android:id="@+id/admin_auth_container"

app/src/main/res/values/styles.xml

@@ -632,4 +632,8 @@
     <item name="android:windowEnterAnimation">@anim/slide_up</item>
     <item name="android:windowExitAnimation">@anim/slide_down</item>
   </style>
+
+  <style name="AdminPinToolbarTextAppearance" parent="TextAppearance.Widget.AppCompat.Toolbar.Title">
+    <item name="android:textSize">20sp</item>
+  </style>
 </resources>