fix(server.json): add packageArguments for stdio subcommand

Add packageArguments to specify the "stdio" subcommand required
to start the MCP server. This ensures MCP clients correctly
invoke: uvx uiautomator2-mcp-server stdio

Per the schema, packageArguments are passed to the package's binary,
while runtimeArguments would be for the runtime tool (uvx itself).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: tanbro

server.json

@@ -12,7 +12,6 @@
       "registryBaseUrl": "https://pypi.org",
       "identifier": "uiautomator2-mcp-server",
       "version": "0.3.0",
-      "runtimeHint": "uvx",
       "transport": {
         "type": "stdio"
       },