Increase epsilon for aspect ratio check

- Increase the epsilon check for aspect ratio change checks
on the Shell side to prevent constant non-config-at-end transitions
potentially conflicting with pinch-resizes (a better way of handling
config + non-config-at-end transitions would need to be laid out
long-term)

- Reset the mWaitingForAspectRatioChange flag upon pip transition state
changes if needed.

- Also change the interpolator for the resize animator

Bug: 377530560
Flag: com.android.wm.shell.enable_pip2
Test: enter YT PiP and pinch-resize repeatedly
Change-Id: I145a8a244c95dcb64da020ec3c6d2e00c71579cb