Extend process observer to be usable for media routing.

It now has a new callback to report changes in the "importance"
of processes.  Rewrote the dispatching code to be a bit more
efficient now that we are sending more reports.

Change-Id: Ie865cfd286455819f04e8c14e9b6fd54d028f8f2

2 files changed, 8 insertions, 0 deletions

diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index 17b1962..92b6f72 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -1360,6 +1360,13 @@ public class ActivityManager {
         public int lastTrimLevel;
 
         /**
+         * Constant for {@link #importance}: this is a persistent process.
+         * Only used when reporting to process observers.
+         * @hide
+         */
+        public static final int IMPORTANCE_PERSISTENT = 50;
+
+        /**
          * Constant for {@link #importance}: this process is running the
          * foreground UI.
          */
diff --git a/core/java/android/app/IProcessObserver.aidl b/core/java/android/app/IProcessObserver.aidl
index 2094294..e587912 100644
--- a/core/java/android/app/IProcessObserver.aidl
+++ b/core/java/android/app/IProcessObserver.aidl
@@ -20,6 +20,7 @@ package android.app;
 oneway interface IProcessObserver {
 
     void onForegroundActivitiesChanged(int pid, int uid, boolean foregroundActivities);
+    void onImportanceChanged(int pid, int uid, int importance);
     void onProcessDied(int pid, int uid);
 
 }