[Unfold animation] Do not animate first progress value in remote provider

Updates unfold remote filter to start animating
values only after the first progress event has received.

Currently the default value is 1f and when
unfolding we might see launcher animating from progress
1f to the current progress and then back to 1f.

Bug: 271099882
Test: atest com.android.systemui.unfold.progress.UnfoldRemoteFilterTest
Test: manual testing fold/unfold with removed black overlay
Test: check that laucher progress perfetto trace doesn't have a jump
Change-Id: I4880d19034cdfd91faebf754939d7906c813a315