Check and move the the PiP window bounds after a fling transition.

- Ignore PiP window bounds check when IME becomes visible and PiP is already in motion (eg: fling)
- Check and move PiP window bounds after fling transition

Bug: 373717506
Flag: com.android.wm.shell.enable_pip2
Video: http://recall/-/enO6UfsUvbbP010y4Er8TK/djheyKZFEByF037Nr7KBhF
Test: Fling PiP window when entering IME.

Change-Id: I4da70bcf0de45ca880c554fe44cd1548d77d8d31