Set vendor: true for boot control HAL

Test: make boot image and check if boot contol HAL implementation
is present in vendor and recovery.
Bug: 117072247

Change-Id: Id05563fc3b4bdf135bf7e1ae75d23f34a98845ab
diff --git a/boot/1.0/default/Android.bp b/boot/1.0/default/Android.bp
index 67dee08..397c56d 100644
--- a/boot/1.0/default/Android.bp
+++ b/boot/1.0/default/Android.bp
@@ -2,7 +2,7 @@
     name: "android.hardware.boot@1.0-impl",
     defaults: ["hidl_defaults"],
     relative_install_path: "hw",
-    vendor_available: true,
+    vendor: true,
     recovery_available: true,
     srcs: ["BootControl.cpp"],