Implement bp2build for prebuilt_etc_xml

Bug: 237039154
Test: xml_conversion_test.go & bp2build
Change-Id: I1f2c57b9532138f73041d8fc08feea3f66b2ebbc
diff --git a/xml/Android.bp b/xml/Android.bp
index 1542930..d4753de 100644
--- a/xml/Android.bp
+++ b/xml/Android.bp
@@ -9,6 +9,7 @@
         "blueprint",
         "blueprint-pathtools",
         "soong",
+        "soong-bp2build",
         "soong-android",
         "soong-etc",
     ],
@@ -18,6 +19,7 @@
     ],
     testSrcs: [
         "xml_test.go",
+        "xml_conversion_test.go",
     ],
     pluginFor: ["soong_build"],
 }