Auto resize to min size if pip too small

Make sure to resize the pip to minimum size
if pip task is pinch resized to a smaller than allowed
minimum size spec (due to the dampening factor).

Bug: 301414095
Test: manually repro the steps in the bugs
Test: atest WMShellFlickerTestsPip:PipPinchInTest

Change-Id: I01437076abd69cc4493b4f12b29751b486ea8e6b