In the newest version of ADT (version 20 preview 3), they say that it's possible to make the libraries' manifest file become mergeable with projects that use them:
Automatic merging of library project manifest files into the including project's manifest. Enable with the manifestmerger.enabled property.
How and where do I use it? I can't see content assist helping with me on this anywhere.
Add the following line to your project.properties file of your application project.
manifestmerger.enabled=true
Introduced with Android SDK Tools, Revision 20 (June 2012):
https://developer.android.com/studio/releases/sdk-tools
Build System
* Added automatic merging of library project manifest files into the including project's manifest. Enable this feature with themanifestmerger.enabledproperty.