Rename ViewTreeViewModelStoreOwner.java to .kt

Part of the kotlin conversion process for the Lifecycle library

Test: ./gradlew bOS
Bug: 240298691
Change-Id: Ic5868cd4f32d9be76a3e37112d9e471262317318
diff --git a/lifecycle/lifecycle-viewmodel/src/main/java/androidx/lifecycle/ViewTreeViewModelStoreOwner.java b/lifecycle/lifecycle-viewmodel/src/main/java/androidx/lifecycle/ViewTreeViewModelStoreOwner.kt
similarity index 100%
rename from lifecycle/lifecycle-viewmodel/src/main/java/androidx/lifecycle/ViewTreeViewModelStoreOwner.java
rename to lifecycle/lifecycle-viewmodel/src/main/java/androidx/lifecycle/ViewTreeViewModelStoreOwner.kt