Make InputWindowInfo as a part of InputWindowHandle (1/2)

All over InputDispatcher, we are accessing InputWindowInfo
from InputWindowHandle through the api getInfo().
It's dangerous without checking the result is null.

- To replace allocated mInfo in updateInfo(), make it as an object
  member variable of InputWindowHandle.
- Change releaseInfo to releaseChannel to release input channel immediately.
- Add displayId information for logs so we can find out the problems
  should belong to which display.

Bug: 112616659
Test: atest inputflinger_tests
Test: Manually enable debug logs
Change-Id: I5770f296e3feab4919fe775bab20ef6346f05295