Revert^3 "Compiler changes for bitstring based type checks."

This reverts commit 3f41323cc9da335e9aa4f3fbad90a86caa82ee4d.

Reason for revert: Fails sporadically.

Bug: 26687569
Bug: 64692057
Bug: 76420366
Change-Id: I84d1e9e46c58aeecf17591ff71fbac6a1e583909
38 files changed