Merge "Preload expensive objects before user is unlocked." into tm-qpr-dev am: 86d8db485f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20391179

Change-Id: I41b2afd3616f2f8fb92e6b9a1bb31359e0d4e258
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

quickstep/src/com/android/quickstep/BootAwarePreloader.kt

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2023 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.quickstep
+
+import android.content.Context
+import android.util.Log
+import com.android.launcher3.LauncherAppState
+import com.android.launcher3.LauncherPrefs
+import com.android.launcher3.isBootAwareStartupDataEnabled
+import com.android.launcher3.util.LockedUserState
+
+/**
+ * Loads expensive objects in memory before the user is unlocked. This decreases experienced latency
+ * when starting the launcher for the first time after a reboot.
+ */
+object BootAwarePreloader {
+    private const val TAG = "BootAwarePreloader"
+
+    @JvmStatic
+    fun start(context: Context) {
+        val lp = LauncherPrefs.get(context)
+        when {
+            LockedUserState.get(context).isUserUnlocked || !isBootAwareStartupDataEnabled -> {
+                /* No-Op */
+            }
+            lp.isStartupDataMigrated -> {
+                Log.d(TAG, "preloading start up data")
+                LauncherAppState.INSTANCE.get(context)
+            }
+            else -> {
+                Log.d(TAG, "queuing start up data migration to boot aware prefs")
+                LockedUserState.get(context).runOnUserUnlocked {
+                    lp.migrateStartupDataToDeviceProtectedStorage()
+                }
+            }
+        }
+    }
+}

quickstep/src/com/android/quickstep/TouchInteractionService.java

@@ -410,6 +410,7 @@ public class TouchInteractionService extends Service
         mDeviceState = new RecentsAnimationDeviceState(this, true);
         mTaskbarManager = new TaskbarManager(this);
         mRotationTouchHelper = mDeviceState.getRotationTouchHelper();
+        BootAwarePreloader.start(this);
 
         // Call runOnUserUnlocked() before any other callbacks to ensure everything is initialized.
         mDeviceState.runOnUserUnlocked(this::onUserUnlocked);