PointerLocationView: Reland optimization for trace drawing

First attempt:
commit I6a5c5953ef80537e7066396e085cb15ad67f33b7

We now resize the trace bitmap whenever the display size changes.

Bug: 283195699
Flag: EXEMPT bug fix
Test: manual, enable pointer location
Change-Id: I47a3d668e212e01c4e911b771980ad839e78499c