Pass config files to metalava

Adds a filegroup "metalava-config-files" whose contents are passed to
Metalava using the `--config-file` option.

Bug: 354699349
Test: m checkapi
Change-Id: I1e246517c2ef678e41214c975aecee97f9faca67
diff --git a/java/metalava/OWNERS b/java/metalava/OWNERS
new file mode 100644
index 0000000..e8c438e
--- /dev/null
+++ b/java/metalava/OWNERS
@@ -0,0 +1,3 @@
+# Bug component: 463936
+
+file:platform/tools/metalava:/OWNERS