Fix AccountManagerServiceTest

Bug: 226979591

AccountManagerServiceTest fails because a PropertyInvalidatedCache
tries to set a system property.  This change puts the caches in test
mode so the test can run.

The change uses the legacy PropertyInvalidatedCache to match a change
that has already gone into master.

Test:
 * atest FrameworksServicesTests:AccountManagerServiceTest

Change-Id: I960120f00290968b4d48ceecd71b22bc8c548e0c

services/tests/servicestests/src/com/android/server/accounts/AccountManagerServiceTest.java

@@ -35,6 +35,7 @@ import android.accounts.AccountManagerInternal;
 import android.accounts.CantAddAccountActivity;
 import android.accounts.IAccountManagerResponse;
 import android.app.AppOpsManager;
+import android.app.PropertyInvalidatedCache;
 import android.app.INotificationManager;
 import android.app.admin.DevicePolicyManager;
 import android.app.admin.DevicePolicyManagerInternal;
@@ -132,6 +133,8 @@ public class AccountManagerServiceTest extends AndroidTestCase {
     protected void setUp() throws Exception {
         MockitoAnnotations.initMocks(this);
 
+        PropertyInvalidatedCache.disableForTestMode();
+
         when(mMockPackageManager.checkSignatures(anyInt(), anyInt()))
                     .thenReturn(PackageManager.SIGNATURE_MATCH);
         final UserInfo ui = new UserInfo(UserHandle.USER_SYSTEM, "user0", 0);