Disable APP_ARCHIVING flag for specific test

APP_ARCHIVING flag was introduced to control archiving feature in
Settings separately from OS.
The broken test was expecting archiving feature flag be disabled but it
didn't take into account a newly introduced flag which was automatically
rolled out in ag/26270549

Test: InstalledAppCounterTest
Bug: n/a
Change-Id: I253cf7e6b28c9f1508c3f9fd1104fdb06b8706c2

tests/robotests/src/com/android/settings/applications/InstalledAppCounterTest.java

@@ -41,9 +41,11 @@ import android.content.pm.ResolveInfo;
 import android.content.pm.UserInfo;
 import android.os.UserHandle;
 import android.os.UserManager;
+import android.platform.test.flag.junit.SetFlagsRule;
 
 import org.junit.Before;
 import org.junit.Ignore;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.ArgumentMatcher;
@@ -85,6 +87,9 @@ public final class InstalledAppCounterTest {
     @Mock
     private PackageManager mPackageManager;
 
+    @Rule
+    public final SetFlagsRule mSetFlagsRule = new SetFlagsRule();
+
     private int mInstalledAppCount = -1;
     private ApplicationInfo mApp1;
     private ApplicationInfo mApp2;
@@ -218,6 +223,7 @@ public final class InstalledAppCounterTest {
                 eq(MAIN_USER_ID))).thenReturn(Arrays.asList(mApp2));
 
         mFakeFeatureFlags.setFlag(Flags.FLAG_ARCHIVING, false);
+        mSetFlagsRule.disableFlags(com.android.settings.flags.Flags.FLAG_APP_ARCHIVING);
         // Count the number of all apps installed, irrespective of install reason.
         count(InstalledAppCounter.IGNORE_INSTALL_REASON, mFakeFeatureFlags);
         assertThat(mInstalledAppCount).isEqualTo(1);