Add phonies as provider instead of updaing a global map.

Bug: 358425833
Test: Manually compare the generated mk and ninja files.
Change-Id: Ie74b620fc680ca2fc0d7836e88361ab3bdb87c49
diff --git a/android/module_context.go b/android/module_context.go
index f619da2..5146782 100644
--- a/android/module_context.go
+++ b/android/module_context.go
@@ -361,7 +361,7 @@
 }
 
 func (m *moduleContext) Phony(name string, deps ...Path) {
-	addPhony(m.config, name, deps...)
+	m.phonies[name] = append(m.phonies[name], deps...)
 }
 
 func (m *moduleContext) GetMissingDependencies() []string {