Always reset blur when blur radius drops to 0

Currently we check if blur is supported in the blur functions. However this doesn't work when getting these calls right after isBlurSupported is changed

Bug: 400590018
Bug: 388891313
Test: manual
Flag: com.android.systemui.notification_shade_blur
Flag: com.android.systemui.bouncer_ui_revamp
Change-Id: I841acdb1fcef7ad33eefe1fa8f34ca4116be5023