Factor out remoteauth dependencies to variables

This will allow using different values for the variables without having
merge conflicts in the dependencies list for each build rule.

Bug: 295788084
Test: m
Change-Id: I7b64a5a01d1f8139e7ce30ce95903d71cb09de9f

remoteauth/service/Android.bp

@@ -27,6 +27,7 @@ java_library {
     srcs: [":remoteauth-service-srcs"],
     required: ["libremoteauth_jni_rust_defaults"],
     defaults: [
+        "enable-remoteauth-targets",
         "framework-system-server-module-defaults",
     ],
     libs: [

remoteauth/service/java/com/android/server/remoteauth/RemoteAuthService.java

@@ -27,6 +27,7 @@ import com.android.internal.util.Preconditions;
 /** Service implementing remoteauth functionality. */
 public class RemoteAuthService extends IRemoteAuthService.Stub {
     public static final String TAG = "RemoteAuthService";
+    public static final String SERVICE_NAME = Context.REMOTE_AUTH_SERVICE;
 
     public RemoteAuthService(Context context) {
         Preconditions.checkNotNull(context);

remoteauth/tests/unit/Android.bp

@@ -18,7 +18,10 @@ package {
 
 android_test {
     name: "RemoteAuthUnitTests",
-    defaults: ["mts-target-sdk-version-current"],
+    defaults: [
+        "enable-remoteauth-targets",
+        "mts-target-sdk-version-current"
+    ],
     sdk_version: "test_current",
     min_sdk_version: "31",