package-manager-native: Add aidl for package change event and observer.

Iorapd, a native service to prefetch files during app startup,
will register it as an observer via the package manager native service.

Bug: 150742983
Test: Make and run on a blueline device and check the observer works.
Change-Id: I98624fe563b83f5dd801f607fa2b31ab6f6998e7
diff --git a/libs/binder/Android.bp b/libs/binder/Android.bp
index bc541f4..e6cfeb4 100644
--- a/libs/binder/Android.bp
+++ b/libs/binder/Android.bp
@@ -158,7 +158,9 @@
 filegroup {
     name: "libbinder_aidl",
     srcs: [
+        "aidl/android/content/pm/IPackageChangeObserver.aidl",
         "aidl/android/content/pm/IPackageManagerNative.aidl",
+        "aidl/android/content/pm/PackageChangeEvent.aidl",
         "aidl/android/os/IClientCallback.aidl",
         "aidl/android/os/IServiceCallback.aidl",
         "aidl/android/os/IServiceManager.aidl",