Use PRODUCT_*_SEPOLICY_DIRS to build product sepolicy. This places to product-specific sepolicy on /product. This CL is like I67636b7aaff2bd5ae5309981f9fa2f8ce51edf6f in aosp, but for redbull. Bug: 119305624 Test: m selinux_policy Change-Id: Ia6a028c6dbbb28938918e5cb4aa4f30adf337dc2