Putting permissions to manifest of Android .aar library project

Question

I am developing an Android project which includes two modules where one is a library module for producing .aar files and another is a sample app utilising the produced .aar file.

Thus, there are two AndroidManifest.xml files in this project. Say I am developing a Bluetooth library, so I put permissions for bluetooth in library's manifest file. By including this library .aar as dependency, can I omit the <uses-permission> tag in the app's manifest file? In other words, does Android app "merge" (may be not literally but semantically) its dependent .aar libraries' permissions?

My experience suggests that while some permissions tend to behave as above, others demand explicit declaration in application's AndroidManifest.xml. I would like to know if my assumption is true, if there are any resources or documentations clearly distinguishing permissions those can reside in .aar library's manifest and those required to be declared in application's own manifest file.

Thank you!

Solution

As far as I know libraries' manifests are merged into the main manifest. According to this document all permissions should be merged as well.