Java API for pulled atoms

This creates a java API for registering pullers. Will implement the
statsd side in a follow up CL.

Test: builds, boots
Change-Id: Ib6735984297ce3148839a6370a3c15b2a585baf5
diff --git a/Android.bp b/Android.bp
index 6e3799b..09e472b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -405,6 +405,8 @@
 filegroup {
     name: "statsd_aidl",
     srcs: [
+        "core/java/android/os/IPullAtomCallback.aidl",
+        "core/java/android/os/IPullAtomResultReceiver.aidl",
         "core/java/android/os/IStatsCompanionService.aidl",
         "core/java/android/os/IStatsManager.aidl",
         "core/java/android/os/IStatsPullerCallback.aidl",