Added persistent custom bootanimation

First boot will always show ROM original's bootanimation

if /sdcard/bootani/bootanimation.zip exists; execute a copy to
/system/media while backing up the original. Next boot will reflect
new bootanimations if changing /sdcard/bootani/bootanimation.zip

If /sdcard/bootani/bootanimation.zip does not exist; execute a copy
of backed up original bootanimation or not execute scripting at all.

Theme Manager will override no matter the circumstances.
Revert "Enable custom bootanimation selections during aroma"

This reverts commit 081ada52650dde718c90caf8a4b68f1203310a7e.