Bug: http://b/194128476
Bug: http://b/210012154
Reverts:
e6840726bd "[coverage] Override -Wframe-larger-than"
71d697c5cb "Enable memory-mapped coverage instrumentation"
Coverage metrics dropped for ~10 of the 40 modules. There are also
regressions in mainline when running tests on older platform builds.
Test: presubmit
Change-Id: I4a2b005d3b54764b762b5422e03b7a9ec8727227