Revert "Revert "Implement rosalloc fast path in assembly for 32 bit arm.""

With a heap poisoning fix.

This reverts commit cf91c7d973f3b2f491abc61d47c141782c96d46e.

Bug: 9986565
Change-Id: Ia72edbde65ef6119e1931a77cc4c595a0b80ce31
7 files changed