Add missing Bazel deps

Author: ejona86

protobuf/BUILD.bazel

@@ -12,6 +12,7 @@ java_library(
         "@com_google_protobuf//:protobuf_java",
         artifact("com.google.api.grpc:proto-google-common-protos"),
         artifact("com.google.code.findbugs:jsr305"),
+        artifact("com.google.errorprone:error_prone_annotations"),
         artifact("com.google.guava:guava"),
     ],
 )

rls/BUILD.bazel

@@ -19,6 +19,7 @@ java_library(
         "@io_grpc_grpc_proto//:rls_java_proto",
         artifact("com.google.auto.value:auto-value-annotations"),
         artifact("com.google.code.findbugs:jsr305"),
+        artifact("com.google.errorprone:error_prone_annotations"),
         artifact("com.google.guava:guava"),
     ],
 )