Make libdng_sdk vendor available.

This means that both system and vendor libraries
can link against it when the vndk is enabled (when
BOARD_VNDK_VERSION=current is set.

Test: build libdng_sdk with BOARD_VNDK_VERSION=current
Bug: 37342627
Change-Id: Ib585e45c3a16afce9df1c2e0af30211aae703ed5
1 file changed