Add warning for legacy VNDK use

Trying to curb propagation of this POC.

Bug: 69526027
Test: N/A
Change-Id: I02000477520951939e5ded6c1c55d6aa644e0b35
1 file changed
tree: 21d6579420905bd9649d1d5bc1f08f17bf3a7cb6
  1. bluetooth/
  2. vndk/