style(banner): 배너 ktlint 지적을 정리한다

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

app/src/test/java/kr/co/vividnext/sodalive/v2/widget/banner/BannerViewTest.kt

@@ -371,7 +371,6 @@ class BannerViewTest {
         listener.onScrollStateChanged(findViewById(R.id.rv_banner), state)
     }
 
-
     private fun BannerView.setCurrentPositionForTest(position: Int) {
         BannerView::class.java.getDeclaredField("currentAdapterPosition").apply {
             isAccessible = true
@@ -379,7 +378,12 @@ class BannerViewTest {
         }
         BannerView::class.java.getDeclaredField("currentIndex").apply {
             isAccessible = true
-            setInt(this@setCurrentPositionForTest, requireNotNull(findViewById<RecyclerView>(R.id.rv_banner).adapter as? BannerAdapter).toRealIndex(position))
+            setInt(
+                this@setCurrentPositionForTest,
+                requireNotNull(
+                    findViewById<RecyclerView>(R.id.rv_banner).adapter as? BannerAdapter
+                ).toRealIndex(position)
+            )
         }
     }