Merge "Update keyguard flow to always be on main thread." into main

    @Test

    fun isEncryptedOrLockdown() =

        testScope.runTest {

        TestScope(mainDispatcher).runTest {

            whenever(userTracker.userId).thenReturn(0)

            whenever(keyguardUpdateMonitor.isEncryptedOrLockdown(0)).thenReturn(true)

                val callback =

                    object : KeyguardUpdateMonitorCallback() {

                        override fun onStrongAuthStateChanged(userId: Int) {

                            trySend(userId)

                            trySendWithFailureLogging(userId, TAG, "strong auth state change")

                        }

                    }

                keyguardUpdateMonitor.registerCallback(callback)

                awaitClose { keyguardUpdateMonitor.removeCallback(callback) }

            }

            .filter { userId -> userId == userTracker.userId }

            .onStart { emit(userTracker.userId) }

            .mapLatest { userId -> keyguardUpdateMonitor.isEncryptedOrLockdown(userId) }

            // KeyguardUpdateMonitor#registerCallback needs to be called on the main thread.

            .flowOn(mainDispatcher)

    override fun isKeyguardShowing(): Boolean {

        return keyguardStateController.isShowing