Revert "update system.prop"

This reverts commit 135c34f40ad34d8892b8aa2d6f9d1d1006a0ac82.
Add Enhanced NFC support
Move AAPT_CONFIG to galaxys2plus-common repo
Move screen sizes to galaxys2plus-common repo
Remove AndroidProducts.mk
Move TARGET_KERNEL_SOURCE to a common repo
Clean up makefiles
Add one more NFC permission
Update file_contexts