Revert "Remove pip resize flicks" DO NOT MERGE

This reverts commit a0253fb49309d4d249055ff459048a69a188be32.

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.
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:ce1ef55f1a4934e16faf5b3ac4ec0b1ea4924324)
Merged-In: I4abd2c5b66d837b73f210a85b62ca65bb6aa1f77
Change-Id: I4abd2c5b66d837b73f210a85b62ca65bb6aa1f77
3 files changed