build:  Add USE_SET_METADATA tag

On some of the older devices the recovery doesn't support
metadata when setting permissions.  This allows to use
set_perm vs set_metadata you will need to set
USE_SET_METADATA := false inside your boardconfig.mk

Change-Id: Ib6cf97b5ca28cee8a87975231f3a61b156e77d29
Revert "Include drawables for all densities - b/11270325"

This saves space on devices with low internal storage

This reverts commit 26c110c74456563e02eb2d117bec725575c40989.

Change-Id: Ic68644d3136bfc7792b349aecfd0c4cc42dcb03d