Set VNDK version to current for module builds

This setting changes which libraries are included in the media.swcodec
apex, and is a step on the way of eliminating the differences when
building between module_arm64 and aosp_arm64.

Bug: 185769808
Bug: 185789027
Test: compare media.swcodec apex build with module_arm64 and aosp_arm64
Merged-In: Iafb0194827f984a7ba108f519016d24b2980e2e1
Change-Id: Iafb0194827f984a7ba108f519016d24b2980e2e1