Support toggling Taskbar All Apps with 3P Launcher.

Taskbar All Apps exists regardless of the default launcher. Thus, we can
toggle it on large screen devices. This CL ties registering the system
action to default launcher and taskbar's enablement.

Test: adb shell input keyevent 117
Test: AllAppsActionManagerTest
Flag: LEGACY ENABLE_ALL_APPS_SEARCH_IN_TASKBAR ENABLED
Fix: 317259709
Change-Id: I26f0ed9e921beac762f3f9e6aaceb1002ad4801a
(cherry picked from commit c113b277e6)

quickstep/tests/multivalentTests/src/com/android/quickstep/AllAppsActionManagerTest.kt

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2024 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.app.PendingIntent
+import android.content.IIntentSender
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR
+import com.android.launcher3.util.TestUtil
+import com.google.common.truth.Truth.assertThat
+import java.util.concurrent.Semaphore
+import java.util.concurrent.TimeUnit.SECONDS
+import org.junit.Test
+import org.junit.runner.RunWith
+
+private const val TIMEOUT = 5L
+
+@RunWith(AndroidJUnit4::class)
+class AllAppsActionManagerTest {
+    private val callbackSemaphore = Semaphore(0)
+    private val bgExecutor = UI_HELPER_EXECUTOR
+
+    private val allAppsActionManager =
+        AllAppsActionManager(
+            InstrumentationRegistry.getInstrumentation().targetContext,
+            bgExecutor,
+        ) {
+            callbackSemaphore.release()
+            PendingIntent(IIntentSender.Default())
+        }
+
+    @Test
+    fun taskbarPresent_actionRegistered() {
+        allAppsActionManager.isTaskbarPresent = true
+        assertThat(callbackSemaphore.tryAcquire(TIMEOUT, SECONDS)).isTrue()
+        assertThat(allAppsActionManager.isActionRegistered).isTrue()
+    }
+
+    @Test
+    fun homeAndOverviewSame_actionRegistered() {
+        allAppsActionManager.isHomeAndOverviewSame = true
+        assertThat(callbackSemaphore.tryAcquire(TIMEOUT, SECONDS)).isTrue()
+        assertThat(allAppsActionManager.isActionRegistered).isTrue()
+    }
+
+    @Test
+    fun toggleTaskbar_destroyedAfterActionRegistered_actionUnregistered() {
+        allAppsActionManager.isTaskbarPresent = true
+        assertThat(callbackSemaphore.tryAcquire(TIMEOUT, SECONDS)).isTrue()
+
+        allAppsActionManager.isTaskbarPresent = false
+        TestUtil.runOnExecutorSync(bgExecutor) {} // Force system action to unregister.
+        assertThat(allAppsActionManager.isActionRegistered).isFalse()
+    }
+
+    @Test
+    fun toggleTaskbar_destroyedBeforeActionRegistered_pendingActionUnregistered() {
+        allAppsActionManager.isTaskbarPresent = true
+        allAppsActionManager.isTaskbarPresent = false
+
+        TestUtil.runOnExecutorSync(bgExecutor) {} // Force system action to unregister.
+        assertThat(callbackSemaphore.tryAcquire(TIMEOUT, SECONDS)).isTrue()
+        assertThat(allAppsActionManager.isActionRegistered).isFalse()
+    }
+
+    @Test
+    fun changeHome_sameAsOverviewBeforeActionUnregistered_actionRegisteredAgain() {
+        allAppsActionManager.isHomeAndOverviewSame = true // Initialize to same.
+        assertThat(callbackSemaphore.tryAcquire(TIMEOUT, SECONDS)).isTrue()
+
+        allAppsActionManager.isHomeAndOverviewSame = false
+        allAppsActionManager.isHomeAndOverviewSame = true
+        assertThat(callbackSemaphore.tryAcquire(TIMEOUT, SECONDS)).isTrue()
+        assertThat(allAppsActionManager.isActionRegistered).isTrue()
+    }
+}