Fixes the issue of UDFPS icon background being white when the device is in DOZE_PULSING state

Test: manually
 1. Disable dark theme and AOD
 2. Enroll fingerprint on a udfps device
 3. Go to lockscreen, keep the phone on a table.
 4. Press power button to force Lockscreen -> Dozing transition
 5. move the phone around on the table to switch from dozing to doze_pulsing
 6. Fingerprint icon background should not be visible now (black)

Fixes: 366100470
Flag: EXEMPT bugfix
Change-Id: I6e962ff0b3bd1184e453b5b1ea247e5efb6f4cec