KOT49F
.1 becomes .2

Change-Id: Ib4208e24e66b05ff441302a817be22ea213eb1df
"KOT49G"
"KOT49H"
build: Add support for PRODUCT_COPY_FILES_OVERRIDES

 * We may have a case where prebuilts need to be built from
   source instead based on an externalized config.
 * New directive takes a list of destination files to remove from
   PRODUCT_COPY_FILES so that other instructions can be supplied.

Change-Id: I7feff16440e54d1676ffddbbd96d5947efa43ede