[CS] Add NoopDeviceEntryFaceAuthRepository.

This is a precursor to ag/23672734, which makes
NotificationStackScrollLayoutController (NSSLC) a singleton.

NSSLC has DeviceEntryFaceAuthRepository as a transitive dependency
(NSSLC injects Optional<NotificationListVM>, which injects
NotificationShelfVM, which injects NotificationShelfInteractor, which
injects DeviceEntryFaceAuthRepository).

Previously, NotificationStackScrollLayoutController and its dependencies
were part of CentralSurfacesComponent, which was only created by
CentralSurfacesImpl which already had DeviceEntryFaceAuthRepository.
Making NSSLC a singleton requires moving those dependencies into
NotificationsModule, which is included in more than just
CentralSurfacesImpl -- specifically, the ARC project.

ARC currently doesn't provide any implementation of
DeviceEntryFaceAuthRepository. By adding this no-op implementation, ARC
can provide that dependency (ARC already includes the
KeyguardFaceAuthNotSupportedModule).

Bug: 277762009
Test: compiles
Change-Id: I68f9db9ed27c99109cab55a66fa3d9d3b7bb27c2

packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardFaceAuthNotSupportedModule.kt

@@ -16,6 +16,8 @@
 
 package com.android.systemui.keyguard.dagger
 
+import com.android.systemui.keyguard.data.repository.DeviceEntryFaceAuthRepository
+import com.android.systemui.keyguard.data.repository.NoopDeviceEntryFaceAuthRepository
 import com.android.systemui.keyguard.domain.interactor.KeyguardFaceAuthInteractor
 import com.android.systemui.keyguard.domain.interactor.NoopKeyguardFaceAuthInteractor
 import dagger.Binds
@@ -32,4 +34,9 @@ import dagger.Module
 interface KeyguardFaceAuthNotSupportedModule {
     @Binds
     fun keyguardFaceAuthInteractor(impl: NoopKeyguardFaceAuthInteractor): KeyguardFaceAuthInteractor
+
+    @Binds
+    fun deviceEntryFaceAuthRepository(
+        impl: NoopDeviceEntryFaceAuthRepository
+    ): DeviceEntryFaceAuthRepository
 }

packages/SystemUI/src/com/android/systemui/keyguard/data/repository/NoopDeviceEntryFaceAuthRepository.kt

@@ -0,0 +1,71 @@
+/*
+ *   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.systemui.keyguard.data.repository
+
+import com.android.keyguard.FaceAuthUiEvent
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.keyguard.shared.model.AuthenticationStatus
+import com.android.systemui.keyguard.shared.model.DetectionStatus
+import javax.inject.Inject
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.emptyFlow
+
+/**
+ * Implementation of the repository that noops all face auth operations.
+ *
+ * This is required for SystemUI variants that do not support face authentication but still inject
+ * other SysUI components that depend on [DeviceEntryFaceAuthRepository].
+ */
+@SysUISingleton
+class NoopDeviceEntryFaceAuthRepository @Inject constructor() : DeviceEntryFaceAuthRepository {
+    override val isAuthenticated: Flow<Boolean>
+        get() = emptyFlow()
+
+    private val _canRunFaceAuth = MutableStateFlow(false)
+    override val canRunFaceAuth: StateFlow<Boolean> = _canRunFaceAuth
+
+    override val authenticationStatus: Flow<AuthenticationStatus>
+        get() = emptyFlow()
+
+    override val detectionStatus: Flow<DetectionStatus>
+        get() = emptyFlow()
+
+    private val _isLockedOut = MutableStateFlow(false)
+    override val isLockedOut: StateFlow<Boolean> = _isLockedOut
+
+    private val _isAuthRunning = MutableStateFlow(false)
+    override val isAuthRunning: StateFlow<Boolean> = _isAuthRunning
+
+    override val isBypassEnabled: Flow<Boolean>
+        get() = emptyFlow()
+
+    /**
+     * Trigger face authentication.
+     *
+     * [uiEvent] provided should be logged whenever face authentication runs. Invocation should be
+     * ignored if face authentication is already running. Results should be propagated through
+     * [authenticationStatus]
+     *
+     * Run only face detection when [fallbackToDetection] is true and [canRunFaceAuth] is false.
+     */
+    override suspend fun authenticate(uiEvent: FaceAuthUiEvent, fallbackToDetection: Boolean) {}
+
+    /** Stop currently running face authentication or detection. */
+    override fun cancel() {}
+}