Because the original modification (restart SF which is added
for display bootanimation) from O to P causes bootanimation NPE,
we remove the part of restart SF and add other flow to show
bootanimation.
Test: manual, ran the test 10 times and it cause no NPE and
display BootAnimation after decrypt
Test: boot aosp_sailfish
Bug: 79547653
Change-Id: I355ccdbb2e2f27d897e2e0ee00f9300ef38ede03