Disable bluetooth toggle test for devices with leanback UX

Devices with leanback UX, often controlled via a remote,
typically connects to the device over a bluetooth or Wi-Fi
connection. Thus if bluetooth is disabled, the device might
loss it's control which makes it difficult to go to the next
step of the test - to enable bluetooth.

Bug: 18283388
Change-Id: Ic79cb754ec8947e798823422c650869e07bf0730
diff --git a/apps/CtsVerifier/AndroidManifest.xml b/apps/CtsVerifier/AndroidManifest.xml
index 0865254..eaf6fbe 100644
--- a/apps/CtsVerifier/AndroidManifest.xml
+++ b/apps/CtsVerifier/AndroidManifest.xml
@@ -151,6 +151,7 @@
             <meta-data android:name="test_category" android:value="@string/bt_control" />
             <meta-data android:name="test_parent" android:value="com.android.cts.verifier.bluetooth.BluetoothTestActivity" />
+            <meta-data android:name="test_excluded_features" android:value="android.software.leanback" />
         <activity android:name=".bluetooth.SecureServerActivity"