Fix settings crash when interact uninstalled app

Set the AdvancedAppInfoPreferenceController preference to disabled when
the app is uninstalled for the current user. This results in every
preference under the advanced section to be greyed out, avoiding the
null pointer exception.

Bug: 238839849
Test: Unit tests && Manual test on multiple apps
Change-Id: I5cdf47575da96f53915f5b552213bf0176f9d1d7

src/com/android/settings/applications/appinfo/AdvancedAppInfoPreferenceCategoryController.java

@@ -18,11 +18,31 @@ package com.android.settings.applications.appinfo;
 
 import android.content.Context;
 
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
 import com.android.settings.widget.PreferenceCategoryController;
+import com.android.settingslib.applications.AppUtils;
+import com.android.settingslib.applications.ApplicationsState;
 
 public class AdvancedAppInfoPreferenceCategoryController extends PreferenceCategoryController {
 
+    private ApplicationsState.AppEntry mAppEntry;
+
     public AdvancedAppInfoPreferenceCategoryController(Context context, String key) {
         super(context, key);
     }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        Preference preference = screen.findPreference(getPreferenceKey());
+        if (preference != null && !AppUtils.isAppInstalled(mAppEntry)) {
+            preference.setEnabled(false);
+        }
+        super.displayPreference(screen);
+    }
+
+    public void setAppEntry(ApplicationsState.AppEntry appEntry) {
+        mAppEntry = appEntry;
+    }
 }

src/com/android/settings/applications/appinfo/AppInfoDashboardFragment.java

@@ -218,9 +218,11 @@ public class AppInfoDashboardFragment extends DashboardFragment
         alarmsAndReminders.setPackageName(packageName);
         alarmsAndReminders.setParentFragment(this);
 
-        use(AdvancedAppInfoPreferenceCategoryController.class).setChildren(Arrays.asList(
-                writeSystemSettings, drawOverlay, pip, externalSource, acrossProfiles,
-                alarmsAndReminders));
+        final AdvancedAppInfoPreferenceCategoryController advancedAppInfo =
+                use(AdvancedAppInfoPreferenceCategoryController.class);
+        advancedAppInfo.setChildren(Arrays.asList(writeSystemSettings, drawOverlay, pip,
+                externalSource, acrossProfiles, alarmsAndReminders));
+        advancedAppInfo.setAppEntry(mAppEntry);
 
         final AppLocalePreferenceController appLocale =
                 use(AppLocalePreferenceController.class);

tests/robotests/src/com/android/settings/applications/appinfo/AdvancedAppInfoPreferenceCategoryControllerTest.java

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.applications.appinfo;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settingslib.applications.ApplicationsState;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class AdvancedAppInfoPreferenceCategoryControllerTest {
+
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
+
+    private Preference mPreference;
+
+    private AdvancedAppInfoPreferenceCategoryController mController;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        Context context = spy(RuntimeEnvironment.application);
+        String preferenceKey = "preference_key";
+        mPreference = spy(new Preference(context));
+        mController = spy(new AdvancedAppInfoPreferenceCategoryController(context, preferenceKey));
+        when(mPreferenceScreen.findPreference(preferenceKey)).thenReturn(mPreference);
+    }
+
+    @Test
+    public void displayPreference_shouldNotBeEnabledWhenAppIsUninstalledForUser() {
+        final ApplicationInfo info = new ApplicationInfo();
+        info.flags = 0;
+        final ApplicationsState.AppEntry appEntry = mock(ApplicationsState.AppEntry.class);
+        appEntry.info = info;
+        mController.setAppEntry(appEntry);
+
+        mController.displayPreference(mPreferenceScreen);
+
+        assertThat(mPreference.isEnabled()).isFalse();
+    }
+}