Continue folding animation after it cancelled if necessary

When folding the device immediately after unfolding
the folding animation wasn't triggering sometimes.
It happenned because we force the animation to end
by 'cancelling' it (setting target progress to 1f and
ignoring all hinge angle events).

Added resetting cancelling when we started folding
again during this cancellation animation.

Bug: 219962337
Test: atest com.android.systemui.unfold.progress.PhysicsBasedUnfoldTransitionProgressProviderTest
Change-Id: Iafd1b3e40f40debf4c09874ddb418a1f2fd2824c