add newlines at the end of files (mostly for pipeline retrigger)

Author: fada21

src/androidTest/java/androidx/core/widget/AdapterViewTest.kt

@@ -214,4 +214,4 @@ class AdapterViewTest {
             }
         }
     }
-}
+}

src/main/java/androidx/core/widget/AdapterView.kt

@@ -110,4 +110,4 @@ inline fun <T> AdapterView<*>.onItemSelected(
             onItemSelected(parent.getItemAtPosition(position) as T)
         }
     }
-}
+}