Revert "Remove pip resize flicks" DO NOT MERGE

This reverts commit a0253fb4.

Reason for revert: The original CL introduced regressions on QPR3 http://b/276806110 and http://b/277677631, and the bug it fixed was present in prior releases e.g. TQ2A.230405.002 (9662652). This will be fixed for U, hence the "do not merge" at the top of revert.

Change-Id: I4abd2c5b66d837b73f210a85b62ca65bb6aa1f77