Revert the increase of PiP resize bounds

This is a revert of ag/33317432: increasing one pixel causes more test
failures than decreasing one pixel. The underlying bug is not fixed,
this remains as a work around.

Flag: EXEMPT testfix
Bug: 414761681
Test: atest PinnedStackTests
Change-Id: I92304d86a0706e7a00d2a96872f34e08692858ce