No longer preload libsfplugin_ccodec in zygote

libsfplugin_ccodec was loaded with dlopen() in initial generation.  It has
since been turned to always-linked.  This makes the performance tweak of
pre-loading in Zygote to improve camera startup latency no longer needed.

Bug: 177694783
Bug: 133186424
Test: functional camera
Change-Id: I054787cf9d6992515d3fccb289f041b536639bea