BT: Moving TARGET_USE_QTI_BT_STACK to product make file

- if TARGET_FWK_SUPPORTS_FULL_VALUEADDS is true,
then TARGET_USE_QTI_BT_STACK should be set to true
to compile QC stack.
- TARGET_USE_QTI_BT_STACK must not be true to compile
  pure aosp bt stack.

Change-Id: Iefe13fea9332c7995353b7da05f5c3c2707bcc38
4 files changed