Fix #5231: "Implied quantity lint warning in pt-rBR strings" (#5259)

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Fix #5231 

1. Replaced quantity "one" with %s at warnings of implied quantity in
pt-rBR strings.
2. Removed new line formats.

<img width="1085" alt="Screenshot 2023-12-04 at 21 22 46"
src="https://github.com/oppia/oppia-android/assets/54560535/852c14eb-c523-4515-b152-32ea6adc9615">

Before 
![Screenshot 2023-12-04 at 20 50
19](https://github.com/oppia/oppia-android/assets/54560535/a6118bc9-6592-49b8-a17a-e9d0995edda2)

After
![Screenshot 2023-12-04 at 20 50
29](https://github.com/oppia/oppia-android/assets/54560535/aefeba2d-9b13-4db2-9a2a-8dd665f8e476)


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app/src/main/res/values-pt-rBR/strings.xml

@@ -185,28 +185,28 @@
   <string name="correct">Correto!</string>
   <string name="topic_prefix">Tópico: %s</string>
   <plurals name="chapter_count" fuzzy="true">
-    <item quantity="one">1 Capítulo\n    </item>
-    <item quantity="other">\n      %s Capítulos\n    </item>
+    <item quantity="one">%s Capítulo</item>
+    <item quantity="other">%s Capítulos</item>
   </plurals>
   <plurals name="story_count" fuzzy="true">
-    <item quantity="one">1 História\n    </item>
-    <item quantity="other">\n      %s Histórias\n    </item>
+    <item quantity="one">%s História</item>
+    <item quantity="other">%s Histórias</item>
   </plurals>
   <plurals name="story_total_chapters">
     <item quantity="one">%s de %s Capítulo Concluído</item>
     <item quantity="other">%s de %s Capítulos Concluídos</item>
   </plurals>
   <plurals name="lesson_count" fuzzy="true">
-    <item quantity="one">1 Lição\n    </item>
-    <item quantity="other">\n      %s Lições\n    </item>
+    <item quantity="one">%s Lição</item>
+    <item quantity="other">%s Lições</item>
   </plurals>
   <plurals name="completed_story_count" fuzzy="true">
-    <item quantity="one">1 história concluída</item>
+    <item quantity="one">%s história concluída</item>
     <item quantity="zero">%s Histórias concluídas</item>
     <item quantity="other">%s Histórias concluídas</item>
   </plurals>
   <plurals name="ongoing_topic_count" fuzzy="true">
-    <item quantity="one">1 Tópico em andamento</item>
+    <item quantity="one">%s Tópico em andamento</item>
     <item quantity="zero">%s Tópicos em andamento</item>
     <item quantity="other">%s Tópicos em andamento</item>
   </plurals>