Revert "Generalize vectorization of Bitmap operation"

This reverts commit 284c261d51092bc9b2e1dfae7acb77d7299ca72c.
Revert "core: fix cpu variant board flag"

This reverts commit 633c90bcbfb8c8bdc73b5c69df4bc14a087b1e28.
Revert "Vectorize bitmap operations on A15 too"

This reverts commit d3b47d0c629900ad87c1c25ed35ab47ebfe6dee8.
Revert "frameworks/base: vectorize Bitmap operations"

This reverts commit e33ad56128237b1d242891ce4a588e638b1d5964.