Drive Launcher unfold animation from System UI

Before this cl, both Launcher and System UI processes were registering for hinge angle and device state (e.g. folded/unfolded) change events to calculate the current unfold animation progress. In some cases, launcher ui thread was busy, delaying the progress calculation from the hinge angle value (that was received ~at the same time by both processes). This resulted in launcher and sysui unfold animation not being synchronized in some cases.

With this cl, System UI process uses OverviewProxyService to send the unfold events to Launcher. In this way, both process always have the exact same progress (+- 1 frame)

This is currently guarded by a launcher flag, by default with the new behaviour, to allow devs to compare the experience and easily debug potential regressions.

Bug: 268490854
Test: Analysed perfetto trace + RemoteUnfoldTransitionProgressProviderTest + manual
Change-Id: Icdf3932644a545f4dbe077c8284911bf99f3d81c