Android Studio steps into wrong sdk source

The following workaround worked for me:

Compile the application without any changes.
Launch the application in Debug mode (and optionally break on breakpoint).
Go to File > Project Structure, find your app module (or/and optionally, any other modules) and change the Compile Sdk Version to one that matches the device you’re debugging on (i.e. 19).
Step into the framework code – it should step into SDK 19 sources.