Always render the device entry icon white in AOD

Previously this was only an issue when the lock icon showed
on AOD but not for the AOD fingerprint icon because the AOD fingerprint icon uses a lottie view.

Lottie drawables don't use the `imageTintList` property for color,
so the lottie aod fp icon would always render white (the lottie
drawable default color from its json file).

Fixes: 341855923
Flag: com.android.systemui.device_entry_udfps_refactor
Test: atest DeviceEntryForegroundViewModelTest
Test: enroll UDFPS; enable aod; enable light mode;
lock down device; see lock icon is white in AOD

Change-Id: I527d9615e42c8274a0b927abaf76808766a621e2