libsuspend: vendor_available.

This is needed by charger in vendor.

Test: builds
Bug: 203246116
Change-Id: I55c5cace9dcd7b2fd475d61234bd469428b4caac
diff --git a/libsuspend/Android.bp b/libsuspend/Android.bp
index 671de4d..144b4b6 100644
--- a/libsuspend/Android.bp
+++ b/libsuspend/Android.bp
@@ -6,6 +6,7 @@
 
 cc_library {
     name: "libsuspend",
+    vendor_available: true,
     srcs: [
         "autosuspend.c",
         "autosuspend_wakeup_count.cpp",