Add new triggerPostinstall() API to support async postinstall script run

Test: th
Bug: 377557752
Change-Id: Ic3ad8b695334f17cf6fba1558853d818ad4f432c
diff --git a/stable/Android.bp b/stable/Android.bp
index 59165a7..2e7bab6 100644
--- a/stable/Android.bp
+++ b/stable/Android.bp
@@ -58,6 +58,11 @@
             version: "2",
             imports: [],
         },
+        {
+            version: "3",
+            imports: [],
+        },
+
     ],
     frozen: true,