Reland "Update zlib to 1.2.11"

Bug: 65743040
Test: run cts -m CtsLibcoreTestCases

This reverts commit 20877b3d.

zlib was previously reverted to 1.2.8 due to a bug in other code that
relied on the specific version of zlib. This bug should no longer be
present in master, so reland the update.