Move altered input handlers to pip2 [1/N]

Move PipInputConsumer, PipTouchState and
PipResizeGestureHandler into the pip2 package.

Temporarily comment out PipTaskOrganizer usages
in PipResizeGestureHandler,
to be replaced by ...pip2.phone.PipScheduler
once PipTouchHandler is also moved into pip2.

Bug: 332770512
Test: N/A until ...pip2.phone.PipTouchHandler is implemented
Change-Id: I30002a84356c284701c534b70de931888684f687