Fix broken hibernation test

ag/14203210 made isAppHibernationEnabled use a cached value rather than
query device config every time. This happened to break a test that
relied on mocking the DeviceConfig value. We update the static value
directly to ensure the feature is enabled in the test.

Bug: 185730191
Test: atest PackageManagerServiceHibernationTests
Change-Id: Icf7d5bedba69cc5af7df2d38bf5088cb08b5cfb6

services/core/java/com/android/server/apphibernation/AppHibernationService.java

diff --git a/services/core/java/com/android/server/apphibernation/AppHibernationService.java b/services/core/java/com/android/server/apphibernation/AppHibernationService.java
index fd829fa..aa51800 100644
--- a/services/core/java/com/android/server/apphibernation/AppHibernationService.java
+++ b/services/core/java/com/android/server/apphibernation/AppHibernationService.java
@@ -109,7 +109,7 @@
     private final boolean mOatArtifactDeletionEnabled;
 
     @VisibleForTesting
-    static boolean sIsServiceEnabled;
+    public static boolean sIsServiceEnabled;
 
     /**
      * Initializes the system service.

services/tests/mockingservicestests/src/com/android/server/pm/PackageManagerServiceHibernationTests.kt

diff --git a/services/tests/mockingservicestests/src/com/android/server/pm/PackageManagerServiceHibernationTests.kt b/services/tests/mockingservicestests/src/com/android/server/pm/PackageManagerServiceHibernationTests.kt
index 411c31c..72bc77e 100644
--- a/services/tests/mockingservicestests/src/com/android/server/pm/PackageManagerServiceHibernationTests.kt
+++ b/services/tests/mockingservicestests/src/com/android/server/pm/PackageManagerServiceHibernationTests.kt
@@ -24,6 +24,7 @@
 import android.testing.TestableLooper
 import android.testing.TestableLooper.RunWithLooper
 import com.android.server.apphibernation.AppHibernationManagerInternal
+import com.android.server.apphibernation.AppHibernationService
 import com.android.server.extendedtestutils.wheneverStatic
 import com.android.server.testutils.whenever
 import org.junit.Assert.assertFalse
@@ -61,6 +62,7 @@
         MockitoAnnotations.initMocks(this)
         wheneverStatic { DeviceConfig.getBoolean(
             NAMESPACE_APP_HIBERNATION, KEY_APP_HIBERNATION_ENABLED, false) }.thenReturn(true)
+        AppHibernationService.sIsServiceEnabled = true
         rule.system().stageNominalSystemState()
         whenever(rule.mocks().injector.getLocalService(AppHibernationManagerInternal::class.java))
             .thenReturn(appHibernationManager)