[automerger skipped] Refactor DialogLaunchAnimator and remove host dialog...

[automerger skipped] Refactor DialogLaunchAnimator and remove host dialog (2/2) am: 27b60523 am: d48d29cb -s ours

am skip reason: Merged-In I43058edeabac2bfc50deceaece893f0b8ad81802 with SHA-1 8c9735bd is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16357440

Change-Id: I424d7a0cff56cbafca6541d59ed54742126a9854