[incremental/pm] register progress listener

Incremental Serivce periodically polls loading progress and sends to
Package Manager Service. Package Manager provides APIs for other
interested parties to listen to the loading progress.

BUG: 165841827
Test: unit test
Change-Id: I44b9e17c2240b9efe53bc09fc728b6671f1f7dfe
diff --git a/Android.bp b/Android.bp
index eacf57c..c6f9362 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1029,6 +1029,7 @@
     name: "incremental_manager_aidl",
     srcs: [
         "core/java/android/os/incremental/IIncrementalService.aidl",
+        "core/java/android/os/incremental/IStorageLoadingProgressListener.aidl",
         "core/java/android/os/incremental/IncrementalNewFileParams.aidl",
         "core/java/android/os/incremental/IStorageHealthListener.aidl",
         "core/java/android/os/incremental/StorageHealthCheckParams.aidl",