Documentation suggestion

[abhlabs]

Describe the bug
documentation improvement

To Reproduce
The first item in the FAQ says:

This message is not related to this package but is related to a change in how Flutter handles splash screens in Flutter 2.5. It is caused by having the following code in your AndroidManifest.xml, which was included by default in previous versions of Flutter:

Expected behavior
There can be many "AndroidManifest.xml" files in the project folder. Documentation could be improved by clarifying that this one is the one in android\app\src\main.

[jonbhanson]

@abhlabs can you make a pull request which adds this documentation and I will be happy to merge it.