Remove bionic libs from APEX_MODULE_LIBS check

The test was to ensure that bionic libs are not installed to the
non-updatable part of the platform (e.g. system/lib). However, for
bionic libs, we actually have been installing them for bootstrapping.
Specifically, they are installed to /system/lib/bootstrap, not
/system/lib. The test has passed just because it didn't look into
/system/lib/bootstrap. Removing the unnecessary check.

Bug: 128708192
Bug: 133140750
Test: m
Test: m out/target/prduct/$(TARGET_DEVICE)/system/lib/libc.so doesn't
work
Change-Id: I93cbd74972cdd2daea45612136d5133fa49ab76a