不支持将多个 Flutter 库（Flutter 模块）同时打包进一个应用

主工程已经接入一个基于flutter_boost打包出的aar了，但是这个aar不受我们团队控制。
官网说：不支持将多个 Flutter 库（Flutter 模块）同时打包进一个应用。

我们是不是不能再建flutter工程，打aar包再加到主工程了？

Start with FlutterBoost's support for an existing flutter_boost AAR in the main application and the documented limitation on packaging multiple Flutter libraries. Determine whether adding another Flutter project and AAR is supported, and document the confirmed constraint or required integration approach as the completed outcome.

Written by the indexing model from the issue text.