Move broadcastradio test to vendor.

This is a vendor test and is causing builds with BOARD_VNDK_VERSION
to fail during soong processing.

Bug: 37342627
Test: BOARD_VNDK_VERSION=current builds fail later
Change-Id: Icc465b36ff0ecb0ac6c13ba99271eb9b86db6948
diff --git a/broadcastradio/1.1/tests/Android.bp b/broadcastradio/1.1/tests/Android.bp
index a9d1562..fa1fd94 100644
--- a/broadcastradio/1.1/tests/Android.bp
+++ b/broadcastradio/1.1/tests/Android.bp
@@ -16,6 +16,7 @@
 
 cc_test {
     name: "android.hardware.broadcastradio@1.1-utils-tests",
+    vendor: true,
     cflags: [
         "-Wall",
         "-Wextra",