Rename test class.

libraries/mediaviewer/impl/src/test/kotlin/io/element/android/libraries/mediaviewer/impl/datasource/EventItemFactoryTest.kt

@@ -60,7 +60,7 @@ import kotlinx.collections.immutable.toImmutableList
 import org.junit.Test
 import kotlin.time.Duration.Companion.seconds
 
-class DefaultEventItemFactoryTest {
+class EventItemFactoryTest {
     @Test
     fun `create check all null cases`() {
         val factory = createEventItemFactory()