Add `//apex_available:platform` in `net-utils-non-bootclasspath-aidl` build rule.

`net-utils-connectivity-apks` has the dependency on
`net-utils-non-bootclasspath-aidl`, to make sure the CaptivePortalLogin
apk module still can use `net-utils-connectivity-apks`, expand the
`net-utils-non-bootclasspath-aidl` to support apk module in platform.

Bug: 329361366
Test: TH
Change-Id: I6d2f723fdc28037ed40072565d93b4307d7f5a45
diff --git a/staticlibs/Android.bp b/staticlibs/Android.bp
index cfb8cef..c141b73 100644
--- a/staticlibs/Android.bp
+++ b/staticlibs/Android.bp
@@ -553,6 +553,7 @@
             apex_available: [
                 "com.android.tethering",
                 "com.android.wifi",
+                "//apex_available:platform",
             ],
         },
         cpp: {