Fix wrong translation for swiping up split task

The wrong calculation is caused by using half size mTaskRect in Split task to calculate the translation X to middle
It should use the fullTaskSize instead of half size. This change refactors the code to store the full size so it does not need to re-calculate many times

Bug: 312371505
Test: Manual, swiping up split task diagonally from right side many times, test the case when mSplitBounds is not null in addAppToOverviewAnim
Test: Tested swipe up to overview for split task/single task in Phone, Tablet and Unfolded phone, with the flag on and off
Flag: ACONFIG com.android.launcher3.enable_grid_only_overview TEAMFOOD
Change-Id: Id2b008a7d9597271e077a125f3195b27196797d7