ActivityManager: use proc state from compiled aidl

bug: 172942349
bug: 159172726
test: builds
Change-Id: I3dafe7a75b2dae561583a7821284027a1896b9a5
diff --git a/Android.bp b/Android.bp
index 6b55cc9..0cc2d48 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1088,6 +1088,14 @@
     path: "core/java",
 }
 
+filegroup {
+    name: "activity_manager_procstate_aidl",
+    srcs: [
+        "core/java/android/app/ProcessStateEnum.aidl",
+    ],
+    path: "core/java",
+}
+
 aidl_interface {
     name: "libincremental_aidl",
     unstable: true,