Make EqualModules a free function.

Bug: 377723687
Test: Unit tests and compare the ninja and mk files generated.
Change-Id: I7e00f09a15f2857f58bea70bcedc4798630a40bc
diff --git a/android/container.go b/android/container.go
index 5dc97d3..a5aab79 100644
--- a/android/container.go
+++ b/android/container.go
@@ -449,7 +449,7 @@
 }
 
 func getContainerModuleInfo(ctx ModuleContext, module Module) (ContainersInfo, bool) {
-	if ctx.EqualModules(ctx.Module(), module) {
+	if EqualModules(ctx.Module(), module) {
 		return ctx.getContainersInfo(), true
 	}