Add licenses() in BUILD files
diff --git a/src/core/lib/tsi/test_creds/BUILD b/src/core/lib/tsi/test_creds/BUILD
index dcd6d93..5cf04ca 100644
--- a/src/core/lib/tsi/test_creds/BUILD
+++ b/src/core/lib/tsi/test_creds/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+licenses(["notice"])  # 3-clause BSD
+
 exports_files([
     "ca.pem",
     "server1.key",
diff --git a/test/core/census/BUILD b/test/core/census/BUILD
index 9ec48bd..49680ab 100644
--- a/test/core/census/BUILD
+++ b/test/core/census/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+licenses(["notice"])  # 3-clause BSD
+
 cc_test(
     name = "context_test",
     srcs = ["context_test.c"],
diff --git a/test/core/channel/BUILD b/test/core/channel/BUILD
index 42cb468..c659046 100644
--- a/test/core/channel/BUILD
+++ b/test/core/channel/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+licenses(["notice"])  # 3-clause BSD
+
 cc_test(
     name = "channel_args_test",
     srcs = ["channel_args_test.c"],
diff --git a/test/core/compression/BUILD b/test/core/compression/BUILD
index a243a72..9ddb4c5 100644
--- a/test/core/compression/BUILD
+++ b/test/core/compression/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+licenses(["notice"])  # 3-clause BSD
+
 cc_test(
     name = "algorithm_test",
     srcs = ["algorithm_test.c"],
diff --git a/test/core/handshake/BUILD b/test/core/handshake/BUILD
index 864e0db..eb8f3a9 100644
--- a/test/core/handshake/BUILD
+++ b/test/core/handshake/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+licenses(["notice"])  # 3-clause BSD
+
 cc_test(
     name = "client_ssl",
     srcs = ["client_ssl.c"],
diff --git a/test/core/support/BUILD b/test/core/support/BUILD
index 08cee14..3183510 100644
--- a/test/core/support/BUILD
+++ b/test/core/support/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+licenses(["notice"])  # 3-clause BSD
+
 cc_test(
     name = "alloc_test",
     srcs = ["alloc_test.c"],
diff --git a/test/core/surface/BUILD b/test/core/surface/BUILD
index c158413..3d5e26c 100644
--- a/test/core/surface/BUILD
+++ b/test/core/surface/BUILD
@@ -27,6 +27,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+licenses(["notice"])  # 3-clause BSD
+
 cc_test(
     name = "alarm_test",
     srcs = ["alarm_test.c"],