AndroidMkEntries() returns multiple AndroidMkEntries structs

AndroidMkEntries now returns multiple AndroidMkEntires so that a module
can emit multiple Make modules if needed.

Bug: 128708192
Test: m

Change-Id: I56b6f76d22943b80329951c5acb80a1b932441ad
diff --git a/java/platform_compat_config.go b/java/platform_compat_config.go
index 23ba2b0..7801634 100644
--- a/java/platform_compat_config.go
+++ b/java/platform_compat_config.go
@@ -71,8 +71,8 @@
 
 }
 
-func (p *platformCompatConfig) AndroidMkEntries() android.AndroidMkEntries {
-	return android.AndroidMkEntries{
+func (p *platformCompatConfig) AndroidMkEntries() []android.AndroidMkEntries {
+	return []android.AndroidMkEntries{android.AndroidMkEntries{
 		Class:      "ETC",
 		OutputFile: android.OptionalPathForPath(p.configFile),
 		Include:    "$(BUILD_PREBUILT)",
@@ -82,7 +82,7 @@
 				entries.SetString("LOCAL_INSTALLED_MODULE_STEM", p.configFile.Base())
 			},
 		},
-	}
+	}}
 }
 
 func platformCompatConfigFactory() android.Module {