add submit button on add info screen

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

@@ -188,13 +188,24 @@
 
             </LinearLayout>
         </LinearLayout>
-
-
-
-
-
-
     </LinearLayout>
 
+    <Button
+        android:id="@+id/confirm_button"
+        android:layout_width="match_parent"
+        android:layout_height="64dp"
+        android:backgroundTint="@color/primary"
+        android:clickable="true"
+        android:elevation="20dp"
+        android:focusable="true"
+        android:text="Confirm"
+        android:textColor="@android:color/white"
+        android:textSize="17sp"
+        app:cornerRadius="27dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        android:layout_marginHorizontal="21dp"
+        android:layout_marginVertical="15dp"/>
+
 
 </androidx.constraintlayout.widget.ConstraintLayout>
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