Do not enable AFDO for coverage builds

This works around an incompatibility between coverage and the
-fdebug-info-for-profiling flag.

also moved -fdebug-info-for-profiling flag so that it is only applied to
the libraries that enabled AFDO.

Test: gzip -cd out/verbose.log.gz | grep debug-info-for-profiling
Bug: 345593672
Change-Id: I68493511da1e61091209d0ed1b2c86c7ba0e21f4