Change libeffect from vendor:true to vendor_available:true

libaudioflinger is still using the lib in the aosp/master branch.

Bug: 33241851
Test: BOARD_VNDK_VERSION=current m -j
Merged-In: I11b54a5f050f914afc234e15f680581d15064c82
Change-Id: I9808ea87ea037a3caef03b2beabd1a717f153a6d
1 file changed