Add NAMESPACE_BLUETOOTH for bluetooth feature experiments

Exempt-From-Owner-Approval: dianne approved, but from her android.com account instead of google.com account
Test: compile
Bug: 156757711
Merged-In: I330b8cc5aeb14ebcc15fb88c605ac72770497040
Change-Id: I330b8cc5aeb14ebcc15fb88c605ac72770497040
2 files changed