This commit removes several Zygote related functions and types from the
greylist that are not required to be there.
Topic: zygote-prefork
Test: make
Bug: 68253328
Change-Id: I25022d976e7444489aad1aeb1ce6b05736233476
Merged-In: I25022d976e7444489aad1aeb1ce6b05736233476