Include OsuLogin in Wifi apex

Build OsuLogin against system_current and make it
available to the wifi apex.

Bug: 149346045
Test: Attempted to connect to an OSU network,
verify OsuLogin page pops up

Change-Id: Ib71772f09d85b544f1298493ca34b10243a6a9f5
diff --git a/packages/OsuLogin/Android.bp b/packages/OsuLogin/Android.bp
index ac3abac..cd9cd1e 100644
--- a/packages/OsuLogin/Android.bp
+++ b/packages/OsuLogin/Android.bp
@@ -3,6 +3,10 @@
     static_libs: ["androidx.legacy_legacy-support-v4"],
     resource_dirs: ["res"],
     srcs: ["src/**/*.java"],
-    platform_apis: true,
-    certificate: "platform",
+    sdk_version: "system_current",
+
+    apex_available: [
+        "com.android.wifi",
+        "test_com.android.wifi",
+    ],
 }