Convert dex2oatPathFromDep to use ModuleProxy.

Bug: 377723687
Test: Unit tests and compare the ninja and mk files generated.
Change-Id: I99ffe88179991da8e5963605bf76666c8945d290
diff --git a/android/module_proxy.go b/android/module_proxy.go
index 8cc8fa1..afca0d7 100644
--- a/android/module_proxy.go
+++ b/android/module_proxy.go
@@ -11,6 +11,10 @@
 
 var _ Module = (*ModuleProxy)(nil)
 
+func (m ModuleProxy) IsNil() bool {
+	return m.module.IsNil()
+}
+
 func (m ModuleProxy) Name() string {
 	return m.module.Name()
 }