[LSC] Add LOCAL_LICENSE_KINDS to system/bt

Added SPDX-license-identifier-Apache-2.0 to:
  gd/btaa/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: Ic6943c23145d418527f3e3d5abc152a3d211402a