Fix crash when primary user select app installed by secondary user.

- PackageManager.getPackageInfo() can return null. When trying to check
the app permission info, check for null package info and only process
the permission info when package info is available.
- Update usage of PackageManager.MATCH_UNINSTALLED_PACKAGES to
PackageManager.MATCH_ANY_USER, as the implementation for querying
packages for other users have been changed.
- Add PackageManager APIs used by AppStateAppOpsBridge to
IPackageManagerWrapper for test purpose.
- Change UserManager.get() to Context.getSystemService() to fix test
failure.

Change-Id: I52de924618aa252ffaae02b8f06ebe5b1d0def61
Fix: 37409266
Test: make RunSettingsRoboTests

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

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2017 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;
+
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Matchers.anyString;
+import static org.mockito.Mockito.when;
+
+import android.Manifest;
+import android.app.AppOpsManager;
+import android.content.Context;
+import android.os.RemoteException;
+import android.os.UserManager;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+import com.android.settingslib.applications.ApplicationsState.AppEntry;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public final class AppStateAppOpsBridgeTest {
+
+    @Mock private Context mContext;
+    @Mock private UserManager mUserManager;
+    @Mock private IPackageManagerWrapper mPackageManagerService;
+    @Mock private AppOpsManager mAppOpsManager;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        when(mContext.getSystemService(Context.USER_SERVICE)).thenReturn(mUserManager);
+        when(mContext.getSystemService(Context.APP_OPS_SERVICE)).thenReturn(mAppOpsManager);
+    }
+
+    @Test
+    public void getPermissionInfo_nullPackageInfo_shouldNotCrash() throws RemoteException {
+        when(mPackageManagerService.getPackageInfo(anyString(), anyInt(), anyInt()))
+            .thenReturn(null);
+        TestAppStateAppOpsBridge appStateAppOpsBridge = new TestAppStateAppOpsBridge();
+
+        appStateAppOpsBridge.getPermissionInfo("pkg1", 1);
+        // should not crash
+    }
+
+    private class TestAppStateAppOpsBridge extends AppStateAppOpsBridge {
+        public TestAppStateAppOpsBridge() {
+            super(mContext, null, null, AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
+                new String[] {Manifest.permission.SYSTEM_ALERT_WINDOW},
+                mPackageManagerService);
+        }
+
+        @Override
+        protected void updateExtraInfo(AppEntry app, String pkg, int uid) {
+        }
+    }
+}