When app dies, destroy snapshot

Also destroy snapshot when we remove the AppWindowToken.

Test: runtest frameworks-services -c
com.android.server.wm.SnapshotCacheTest
Test: Open app, go home, kill app, make sure snapshots are
destroyed.

Change-Id: I532c2d7499a86164175f9fcbc8b77c6eb6bfeae6

1 files changed, 6 insertions, 0 deletions

diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index 3170d0d97af0..e036a85d3087 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -2172,6 +2172,12 @@ public class ActivityManager {
             dest.writeParcelable(mContentInsets, 0);
         }
 
+        @Override
+        public String toString() {
+            return "TaskSnapshot{mSnapshot=" + mSnapshot + " mOrientation=" + mOrientation
+                    + " mContentInsets=" + mContentInsets.toShortString();
+        }
+
         public static final Creator<TaskSnapshot> CREATOR = new Creator<TaskSnapshot>() {
             public TaskSnapshot createFromParcel(Parcel source) {
                 return new TaskSnapshot(source);