Rename updatable-library to apex-library

Mostly for consistency with the names used in related changes.

Test: m nothing

Bug: 191978330
Change-Id: I34637986ead1c671bcc649891aceb3fe0f44b52a
diff --git a/java/sdk_library_test.go b/java/sdk_library_test.go
index f3a19e9..e60ca00 100644
--- a/java/sdk_library_test.go
+++ b/java/sdk_library_test.go
@@ -338,7 +338,7 @@
 `)
 	// test that updatability attributes are passed on correctly
 	fooUpdatable := result.ModuleForTests("foo.xml", "android_common").Rule("java_sdk_xml")
-	android.AssertStringDoesContain(t, "foo.xml java_sdk_xml command", fooUpdatable.RuleParams.Command, `<updatable-library`)
+	android.AssertStringDoesContain(t, "foo.xml java_sdk_xml command", fooUpdatable.RuleParams.Command, `<apex-library`)
 	android.AssertStringDoesNotContain(t, "foo.xml java_sdk_xml command", fooUpdatable.RuleParams.Command, `<library`)
 }