Add stub NearbyService

The stub allows building the module before NearbyService is fully
implemented in all branches.

Bug: 189355156
Test: m
Merged-In: I7e280495f1eefada0939dad2ce7f47f45885ad66
Change-Id: I5c0c7f7a58946e0ff0902a17ca1dc33863519cf9
diff --git a/nearby/Android.bp b/nearby/Android.bp
index baa0740..b968f5d 100644
--- a/nearby/Android.bp
+++ b/nearby/Android.bp
@@ -31,7 +31,7 @@
 
 java_library {
     name: "service-nearby",
-    srcs: [],
+    srcs: ["service-src/**/*.java"],
     sdk_version: "module_current",
     min_sdk_version: "30",
     apex_available: ["com.android.tethering"],