Removing static instances of UserManagerCompat and AppWidgetManager

> Changing the lifecycle to follow other static objects in Launcher
> Removing compat interface and inlining everything to helpers

Bug: 141376165
Change-Id: I82bd5db1969101de9a7eac77f32728d70195bb35

src/com/android/launcher3/pm/UserCache.java

@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2014 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.launcher3.pm;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Process;
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.util.ArrayMap;
+import android.util.LongSparseArray;
+
+import com.android.launcher3.util.MainThreadInitializedObject;
+import com.android.launcher3.util.SafeCloseable;
+import com.android.launcher3.util.SimpleBroadcastReceiver;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Class which manages a local cache of user handles to avoid system rpc
+ */
+public class UserCache {
+
+    public static final MainThreadInitializedObject<UserCache> INSTANCE =
+            new MainThreadInitializedObject<>(UserCache::new);
+
+    private final Context mContext;
+    private final UserManager mUserManager;
+    private final ArrayList<Runnable> mUserChangeListeners = new ArrayList<>();
+    private final SimpleBroadcastReceiver mUserChangeReceiver =
+            new SimpleBroadcastReceiver(this::onUsersChanged);
+
+    private LongSparseArray<UserHandle> mUsers;
+    // Create a separate reverse map as LongSparseArray.indexOfValue checks if objects are same
+    // and not {@link Object#equals}
+    private ArrayMap<UserHandle, Long> mUserToSerialMap;
+
+    private UserCache(Context context) {
+        mContext = context;
+        mUserManager = context.getSystemService(UserManager.class);
+    }
+
+    private void onUsersChanged(Intent intent) {
+        enableAndResetCache();
+        mUserChangeListeners.forEach(Runnable::run);
+    }
+
+    /**
+     * Adds a listener for user additions and removals
+     */
+    public SafeCloseable addUserChangeListener(Runnable command) {
+        synchronized (this) {
+            if (mUserChangeListeners.isEmpty()) {
+                // Enable caching and start listening for user broadcast
+                mUserChangeReceiver.register(mContext,
+                        Intent.ACTION_MANAGED_PROFILE_ADDED,
+                        Intent.ACTION_MANAGED_PROFILE_REMOVED);
+                enableAndResetCache();
+            }
+            mUserChangeListeners.add(command);
+            return () -> removeUserChangeListener(command);
+        }
+    }
+
+    private void enableAndResetCache() {
+        synchronized (this) {
+            mUsers = new LongSparseArray<>();
+            mUserToSerialMap = new ArrayMap<>();
+            List<UserHandle> users = mUserManager.getUserProfiles();
+            if (users != null) {
+                for (UserHandle user : users) {
+                    long serial = mUserManager.getSerialNumberForUser(user);
+                    mUsers.put(serial, user);
+                    mUserToSerialMap.put(user, serial);
+                }
+            }
+        }
+    }
+
+    private void removeUserChangeListener(Runnable command) {
+        synchronized (this) {
+            mUserChangeListeners.add(command);
+            if (mUserChangeListeners.isEmpty()) {
+                // Disable cache and stop listening
+                mContext.unregisterReceiver(mUserChangeReceiver);
+
+                mUsers = null;
+                mUserToSerialMap = null;
+            }
+        }
+    }
+
+    /**
+     * Returns true if any user profile has quiet mode enabled.
+     */
+    public boolean isAnyProfileQuietModeEnabled() {
+        List<UserHandle> userProfiles = getUserProfiles();
+        for (UserHandle userProfile : userProfiles) {
+            if (Process.myUserHandle().equals(userProfile)) {
+                continue;
+            }
+            if (mUserManager.isQuietModeEnabled(userProfile)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * @see UserManager#getSerialNumberForUser(UserHandle)
+     */
+    public long getSerialNumberForUser(UserHandle user) {
+        synchronized (this) {
+            if (mUserToSerialMap != null) {
+                Long serial = mUserToSerialMap.get(user);
+                return serial == null ? 0 : serial;
+            }
+        }
+        return mUserManager.getSerialNumberForUser(user);
+    }
+
+    /**
+     * @see UserManager#getUserForSerialNumber(long)
+     */
+    public UserHandle getUserForSerialNumber(long serialNumber) {
+        synchronized (this) {
+            if (mUsers != null) {
+                return mUsers.get(serialNumber);
+            }
+        }
+        return mUserManager.getUserForSerialNumber(serialNumber);
+    }
+
+    /**
+     * @see UserManager#getUserProfiles()
+     */
+    public List<UserHandle> getUserProfiles() {
+        synchronized (this) {
+            if (mUsers != null) {
+                return new ArrayList<>(mUserToSerialMap.keySet());
+            }
+        }
+
+        List<UserHandle> users = mUserManager.getUserProfiles();
+        return users == null ? Collections.emptyList() : users;
+    }
+
+    /**
+     * Returns true is there is at least one user profile enabled
+     */
+    public boolean hasWorkProfile() {
+        synchronized (this) {
+            if (mUsers != null) {
+                return mUsers.size() > 1;
+            }
+        }
+        return getUserProfiles().size() > 1;
+    }
+}