Fallback to default device settings if not found for virtual device

Add a deviceId check so that we perform the fallback only when
the original request was for a virtual device.

Test: atest SettingsProviderTest
Bug: 371801645
Flag: android.companion.virtualdevice.flags.device_aware_settings_override
Change-Id: Id35eef0fe155a0efbfa6e26943877df8a8db3b6d