Do not link libc++.so statically on device.

If fuzzer coverage sanitized shared libraries are not deployed - we shouldn't
break users during dynamic link time. I need to think more about how we
should solve this problem in earnest, but for now let's just disable
static linkage of libc++ on device.

Bug: 142671952
Test: Cherrypick ag/9550833 and ag/9544155, make and run the fuzz target
there.

Change-Id: I39dfd6ba314e7a610ef3f0b30f35383a5e3a1e4b