AOSP: Move system_shared_libs into target.bionic clause

AOSP: Move system_shared_libs into target.bionic clause

Use target.bionic.system_shared_libs when it is used to limit the
default shared libraries (as opposed to remove them completely).
This avoids attempting to add a host dependency on libc when
system_shared_libs is modified to apply to all variants.

Also remove system_shared_libs from static binaries where it has
no effect, and consolidate it into e2fsprogs-defaults.

Bug: 193559105
Test: m checkbuild
Change-Id: I2d447b006afc783f4acd6c1acd93f338a68a01ed
From AOSP commit: 48fa7248112701c30d3cabfb8d3360b2408d6491