ContentSuggestions - restore snapshots when needed

Make ContentSuggestions restore snapshots from disk where needed.
Previously this wasn't needed as only the running task would be
used for content suggestions. Now it can be invoked for any task
in Overview so need to be able to restore snapshots from disk.

Bug: 149595462
Test: manual
Change-Id: Ia67efc122a44b27a9049e48afaf2ddb789bc31b9
diff --git a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
index 890b945..659bb99 100644
--- a/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/wm/ActivityTaskManagerService.java
@@ -7476,10 +7476,10 @@
         }
 
         @Override
-        public ActivityManager.TaskSnapshot getTaskSnapshotNoRestore(int taskId,
-                boolean isLowResolution) {
+        public ActivityManager.TaskSnapshot getTaskSnapshotBlocking(
+                int taskId, boolean isLowResolution) {
             return ActivityTaskManagerService.this.getTaskSnapshot(taskId, isLowResolution,
-                    false /* restoreFromDisk */);
+                    true /* restoreFromDisk */);
         }
 
         @Override