Fix multi-toggle flicker bug

BUG: 343317785
Test: local tested
Flag: com.android.settings.flags.enable_bluetooth_device_details_polish
Change-Id: Ib5e700412c112ff6fa19b54f341fbd598c6b345c

src/com/android/settings/bluetooth/ui/viewmodel/BluetoothDeviceDetailsViewModel.kt

@@ -58,6 +58,8 @@ class BluetoothDeviceDetailsViewModel(
             deviceSettingRepository.getDeviceSettingsConfig(cachedDevice)
         }
 
+    private val spatialAudioModel by lazy { spatialAudioInteractor.getDeviceSetting(cachedDevice) }
+
     suspend fun getItems(fragment: FragmentTypeModel): List<DeviceSettingConfigItemModel>? =
         when (fragment) {
             is FragmentTypeModel.DeviceDetailsMainFragment -> items.await()?.mainItems
@@ -81,7 +83,7 @@ class BluetoothDeviceDetailsViewModel(
         }
         return when (settingId) {
             DeviceSettingId.DEVICE_SETTING_ID_SPATIAL_AUDIO_MULTI_TOGGLE ->
-                spatialAudioInteractor.getDeviceSetting(cachedDevice)
+                spatialAudioModel
             else -> deviceSettingRepository.getDeviceSetting(cachedDevice, settingId)
         }.map { it?.toPreferenceModel() }
     }