Make libqcomvisualizer build with the VNDK.

When the vndk is enabled (BOARD_VNDK_VERSION=current),
vendor libraries must only link against vendor variants
in the build system. This means that they receive restricted
sets of headers and that automatic global headers are restricted.

Test: build libqcomvisualizer with BOARD_VNDK_VERSION=current
Bug: 37342627
Change-Id: I7f17946754091ac3a71ccc6451429bb1cd60d13b