Revert "4.3: Add theme chooser support"

This reverts commit 7de451bfdfcea607d22f6e1f9885920dba5b17b0.

(cherry picked from commit 2e238f496776cbdb9e7bf53e160a13367c9f2071)
vendor_pa: Add THEME ENGINE Support

This reverts commit 2e238f496776cbdb9e7bf53e160a13367c9f2071.

(cherry picked from commit 72fd85dc3629d5a39ba0234cb74ff63e776bac4c)