Adds the initial SmartSpace shared element transition!

To see this in action, enable the remote animation (adb shell setprop persist.wm.enable_remote_keyguard_animation 1) and enhanced SmartSpace (adb shell device_config put launcher ENABLE_SMARTSPACE_ENHANCED true). Also, set your lock mode to swipe or some sort of non-bypass biometrics, so you can swipe to unlock.
KIs:
- It looks pretty janky on a fast swipe - this is the same root cause as b/186847064 so will have the same fix
- Launcher animates in with window-level animations (Launcher team is looking into helping)
- Screen off animation is not yet implemented (this is for unlock only)

Bug: 187025480
Test: unlock with every possible permutation of lock settings
Change-Id: I8c186fe57132ebc9a0bc5e3d8785e753e72c3bf2