ADFA-4317: Indicate scrolling on code characters toolbar (#1387)

* feat(ADFA-4317): Show scrollbar in code character toolbar

* feat(ADFA-4317): Adjust scrollbar size

Author: dara-abijo-adfa

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

@@ -45,6 +45,11 @@
 
     <com.itsaky.androidide.ui.SymbolInputView
       android:id="@+id/symbol_input"
+        android:fadeScrollbars="false"
+        android:scrollbarAlwaysDrawHorizontalTrack="true"
+        android:scrollbarSize="2dp"
+        android:scrollbarStyle="outsideInset"
+        android:scrollbars="horizontal"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"/>