AppClone: Implement clone backend flow

- Add onClick listeners of add/trash icons on Cloned Apps page
- New layout with ImageView(Add icon) and ProgressBar
- Creation of clone user and install package in clone user
- Uninstallation of cloned app
- Summary when app is being cloned and after clone completion
- Action metrics

Bug: 259022623
Test: make RunSettingsRoboTests -j64
Change-Id: Idc76fb8d88ba8987084beef2a0ce4c57d6c45b9e

src/com/android/settings/applications/manageapplications/CloneBackend.java

@@ -0,0 +1,163 @@
+/*
+ * 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.manageapplications;
+
+import static android.content.pm.PackageManager.INSTALL_ALL_WHITELIST_RESTRICTED_PERMISSIONS;
+import static android.content.pm.PackageManager.INSTALL_FAILED_INVALID_URI;
+import static android.content.pm.PackageManager.INSTALL_REASON_USER;
+import static android.os.UserManager.USER_TYPE_PROFILE_CLONE;
+
+import android.app.ActivityManagerNative;
+import android.app.AppGlobals;
+import android.app.IActivityManager;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.RemoteException;
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.util.Log;
+
+import androidx.fragment.app.FragmentActivity;
+
+import com.android.settings.Utils;
+
+import java.util.HashSet;
+
+/**
+ * Handles clone user creation and clone app install/uninstall.
+ */
+public class CloneBackend {
+
+    public static final String TAG = "CloneBackend";
+    public static final int SUCCESS = 0;
+    private static final int ERROR_CREATING_CLONE_USER = 1;
+    private static final int ERROR_STARTING_CLONE_USER = 2;
+    private static final int ERROR_CLONING_PACKAGE = 3;
+    private static CloneBackend sInstance;
+    private Context mContext;
+    private int mCloneUserId;
+
+    private CloneBackend(Context context) {
+        mContext = context;
+        mCloneUserId = Utils.getCloneUserId(context);
+    }
+
+    /**
+     * @param context
+     * @return a CloneBackend object
+     */
+    public static CloneBackend getInstance(Context context) {
+        if (sInstance == null) {
+            sInstance = new CloneBackend(context);
+        }
+        return sInstance;
+    }
+
+    /**
+     * Starts activity to uninstall cloned app.
+     *
+     * <p> Invokes {@link com.android.packageinstaller.UninstallerActivity} which then displays the
+     * dialog to the user and handles actual uninstall.
+     */
+    void uninstallClonedApp(String packageName, boolean allUsers, FragmentActivity activity) {
+        // Create new intent to launch Uninstaller activity
+        Uri packageUri = Uri.parse("package:" + packageName);
+        Intent uninstallIntent = new Intent(Intent.ACTION_UNINSTALL_PACKAGE, packageUri);
+        uninstallIntent.putExtra(Intent.EXTRA_UNINSTALL_ALL_USERS, allUsers);
+        uninstallIntent.putExtra(Intent.EXTRA_USER, UserHandle.of(mCloneUserId));
+        activity.startActivityForResult(uninstallIntent, 0);
+    }
+
+    /**
+     * Installs another instance of given package in clone user.
+     *
+     * <p> Creates clone user if doesn't exist and starts the new user before installing app.
+     * @param packageName
+     * @return error/success code
+     */
+    int installCloneApp(String packageName) {
+        String userName = "cloneUser";
+        UserHandle cloneUserHandle = null;
+        boolean newlyCreated = false;
+
+        // Create clone user if not already exists.
+        if (mCloneUserId == -1) {
+            UserManager um = mContext.getSystemService(UserManager.class);
+            try {
+                cloneUserHandle = um.createProfile(userName, USER_TYPE_PROFILE_CLONE,
+                        new HashSet<>());
+            } catch (Exception e) {
+                if (ManageApplications.DEBUG) {
+                    Log.e("ankita", "Error occurred creating clone user" + e.getMessage());
+                }
+                return ERROR_CREATING_CLONE_USER;
+            }
+
+            if (cloneUserHandle != null) {
+                mCloneUserId = cloneUserHandle.getIdentifier();
+                newlyCreated = true;
+                if (ManageApplications.DEBUG) {
+                    Log.d(TAG, "Created clone user " + mCloneUserId);
+                }
+            } else {
+                mCloneUserId = -1;
+            }
+        }
+
+        if (mCloneUserId > 0) {
+            // If clone user is newly created for the first time, then start this user.
+            if (newlyCreated) {
+                IActivityManager am = ActivityManagerNative.getDefault();
+                try {
+                    am.startUserInBackground(mCloneUserId);
+                } catch (RemoteException e) {
+                    if (ManageApplications.DEBUG) {
+                        Log.e(TAG, "Error starting clone user " + e.getMessage());
+                    }
+                    return ERROR_STARTING_CLONE_USER;
+                }
+            }
+
+            // Install given app in clone user
+            int res = 0;
+            try {
+                res = AppGlobals.getPackageManager().installExistingPackageAsUser(
+                        packageName, mCloneUserId,
+                        INSTALL_ALL_WHITELIST_RESTRICTED_PERMISSIONS, INSTALL_REASON_USER, null);
+            } catch (RemoteException e) {
+                if (ManageApplications.DEBUG) {
+                    Log.e(TAG, "Error installing package" + packageName + " in clone user."
+                            + e.getMessage());
+                }
+                return ERROR_CLONING_PACKAGE;
+            }
+
+            if (res == INSTALL_FAILED_INVALID_URI) {
+                if (ManageApplications.DEBUG) {
+                    Log.e(TAG, "Package " + packageName + " doesn't exist.");
+                }
+                return ERROR_CLONING_PACKAGE;
+            }
+        }
+
+        if (ManageApplications.DEBUG) {
+            Log.i(TAG, "Package " + packageName + " cloned successfully.");
+        }
+        return SUCCESS;
+    }
+}