[analysis_server] Remove a few instances of dynamic

Change-Id: If117a852bf052f9e3deb879cdd92c48b68241b26
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/423161
Reviewed-by: Samuel Rawlins <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Samuel Rawlins <[email protected]>

Author: parlough

pkg/analysis_server/lib/protocol/protocol.dart

@@ -332,7 +332,7 @@ class Response extends RequestOrResponse {
       );
 
   /// Create and return the `DEBUG_PORT_COULD_NOT_BE_OPENED` error response.
-  Response.debugPortCouldNotBeOpened(Request request, dynamic error)
+  Response.debugPortCouldNotBeOpened(Request request, Object? error)
     : this(
         request.id,
         error: RequestError(
@@ -499,7 +499,7 @@ class Response extends RequestOrResponse {
 
   /// Initialize a newly created instance to represent the
   /// INVALID_FILE_PATH_FORMAT error condition.
-  Response.invalidFilePathFormat(Request request, path)
+  Response.invalidFilePathFormat(Request request, Object? path)
     : this(
         request.id,
         error: RequestError(
@@ -557,7 +557,11 @@ class Response extends RequestOrResponse {
 
   /// Initialize a newly created instance to represent the SERVER_ERROR error
   /// condition.
-  factory Response.serverError(Request request, exception, stackTrace) {
+  factory Response.serverError(
+    Request request,
+    Object? exception,
+    Object? stackTrace,
+  ) {
     var error = RequestError(
       RequestErrorCode.SERVER_ERROR,
       exception.toString(),