Do not append deps to exports when java_library has only proto srcs

This is to address the comment in aosp/2748099

Test: CI

Bug: 285952385
Change-Id: I0bc8c76e2bc9ee113ced8642e0ab93a95799211c
diff --git a/bp2build/java_proto_conversion_test.go b/bp2build/java_proto_conversion_test.go
index dfef697..b254710 100644
--- a/bp2build/java_proto_conversion_test.go
+++ b/bp2build/java_proto_conversion_test.go
@@ -167,10 +167,7 @@
 					"sdk_version":  `"current"`,
 				}),
 			MakeBazelTarget("java_library", "java-protos", AttrNameToString{
-				"exports": `[
-        ":java-protos_java_proto_lite",
-        ":java-lib-neverlink",
-    ]`,
+				"exports":      `[":java-protos_java_proto_lite"]`,
 				"java_version": `"7"`,
 				"sdk_version":  `"current"`,
 			}),