Fix folder morphing animation

  - Also splits interpolator between open / closing anim to setup future folder motion work
  - Also fixed bug if no shape selected in picker

Bug: 393979768
Bug: 387543793
Test: Manual verify animation and picker bug
Flag: com.android.launcher3.enable_launcher_icon_shapes

Change-Id: Ieb7355b9128cd1ded46af6787f5c14baf9be6774