Allow nullable in LogBuffers in ClockEventController

Bug: 243942947
Test: atest KeyguardClockSwitchScreenshotTest
Change-Id: I51d7dfbcd4b1c8a63f145b54fab59bae182a6ed4

packages/SystemUI/src/com/android/keyguard/ClockEventController.kt

@@ -69,14 +69,17 @@ open class ClockEventController @Inject constructor(
     private val context: Context,
     @Main private val mainExecutor: Executor,
     @Background private val bgExecutor: Executor,
-    @KeyguardClockLog private val logBuffer: LogBuffer,
+    @KeyguardClockLog private val logBuffer: LogBuffer?,
     private val featureFlags: FeatureFlags
 ) {
     var clock: ClockController? = null
         set(value) {
             field = value
             if (value != null) {
-                value.setLogBuffer(logBuffer)
+                if (logBuffer != null) {
+                    value.setLogBuffer(logBuffer)
+                }
+
                 value.initialize(resources, dozeAmount, 0f)
                 updateRegionSamplers(value)
             }

packages/SystemUI/tests/src/com/android/keyguard/ClockEventControllerTest.kt

@@ -65,7 +65,6 @@ import org.mockito.junit.MockitoJUnit
 class ClockEventControllerTest : SysuiTestCase() {
 
     @JvmField @Rule val mockito = MockitoJUnit.rule()
-    @Mock private lateinit var keyguardInteractor: KeyguardInteractor
     @Mock private lateinit var broadcastDispatcher: BroadcastDispatcher
     @Mock private lateinit var batteryController: BatteryController
     @Mock private lateinit var keyguardUpdateMonitor: KeyguardUpdateMonitor