Make libaudioeffects 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 libaudioeffects with BOARD_VNDK_VERSION=current
Bug: 37342627
Change-Id: I1aa26abd1486e5b432617cb37eaf69e777e7ca6f
1 file changed