Remove the concept of "early mutator". am: 83a5a308b1 am: 85011ed22a am: 24a8eb0e51 am: c25454a0d5 am: cfcb14e688

Original change: https://android-review.googlesource.com/c/platform/build/blueprint/+/2067144

Change-Id: Icd1fa001a0e44e7a5cb1931f07a74a9710fa8bc5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>