Make sure PipBoundsHelper (on TVs) receives DisplayInfo

In order to make sure that PipBoundsHelper holds a valid DisplayInfo
that it could use in its calculations, call
PipBoundsHelper.onDisplayInfoChanhed() wich the current DisplayInfo from
tv/PipManager constuctors (same as phone/PipManager does).

Bug: 153711420
Bug: 153613389
Bug: 153050065
Test: manually
Change-Id: Iab2d377bc7c816b614df3bfa2b6eafa080cd3b4d