Add unused count API

Add unused count API to PermissionControllerManager to allow Settings to
pull the number of unused apps from PermissionController.

Bug: 200087723
Bug: 187465752
Test: CTS test in topic
Change-Id: I197b07af0e7a40bb5daececd8ef7d053a2895016

1 files changed, 31 insertions, 0 deletions

diff --git a/core/java/android/permission/PermissionControllerManager.java b/core/java/android/permission/PermissionControllerManager.java
index 00f9e45fa22e..a0788e70b247 100644
--- a/core/java/android/permission/PermissionControllerManager.java
+++ b/core/java/android/permission/PermissionControllerManager.java
@@ -69,6 +69,7 @@ import java.util.Objects;
 import java.util.concurrent.Executor;
 import java.util.concurrent.TimeUnit;
 import java.util.function.Consumer;
+import java.util.function.IntConsumer;
 
 /**
  * Interface for communicating with the permission controller.
@@ -786,4 +787,34 @@ public final class PermissionControllerManager {
             }
         }, executor);
     }
+
+    /**
+     * Get the number of unused, hibernating apps for the user.
+     *
+     * @param executor executor to run callback on
+     * @param callback callback for when result is generated
+     */
+    public void getUnusedAppCount(@NonNull @CallbackExecutor Executor executor,
+            @NonNull IntConsumer callback) {
+        checkNotNull(executor);
+        checkNotNull(callback);
+
+        mRemoteService.postAsync(service -> {
+            AndroidFuture<Integer> unusedAppCountResult = new AndroidFuture<>();
+            service.getUnusedAppCount(unusedAppCountResult);
+            return unusedAppCountResult;
+        }).whenCompleteAsync((count, err) -> {
+            if (err != null) {
+                Log.e(TAG, "Error getting unused app count", err);
+                callback.accept(0);
+            } else {
+                final long token = Binder.clearCallingIdentity();
+                try {
+                    callback.accept((int) count);
+                } finally {
+                    Binder.restoreCallingIdentity(token);
+                }
+            }
+        });
+    }
 }