When I import the GameList project I have a number of errors with the files in the 'src' and 'gen' directory which stops the project from building.
Make sure that you are also importing the engine and marking it as a library for the GameList project -- they are two separate projects, the latter depending on the engine to build and run.
I spoke to a coder friend who has a lot of experience with working with cross-platform stuff and had said the game would need to be packed into an obb file being over 50mb. You would then need to write a good bit of Java to get the current version of the AGS Android engine to bypass the start-up game list menu screen, set various graphical options and screen orientation and unpack the game from the .obb.
Yes and no on this. To release on the Google Play store the APK itself cannot exceed 50 MB, which is when you would need to pack your game into an OBB file. The Android SDK has a tool for this, but the last time I was looking into this (quite some time ago, actually) the tool was badly bugged and could not pack more than 512 MB into a single OBB file (the particular formatting used in these OBB files should allow at least 2 GB). I wrote a simple fix for it, and I was able to publish standalone APKs with game data packaged in OBB files over the Play store, but none were ever released because there were game-stopping silent crashes in all tests conducted by anyone other than myself.
Regarding reading the OBB file, there's no need to "unpack" it, as it can be mounted as a read-only disk directly, and the engine can be set up quite simply to divert write operations to the appropriate data directory. It's really quite simple to set this part up. I had more difficulty trying to design a decent UI for the downloader in case the OBB file had been corrupted or deleted yet the APK still installed (the code was simple enough, I'm just not a visual design type of person).
I do also realize that I inadvertently changed some code that removed the on-screen menu from the engine, but I have not had time to look into this. This alongside the silent crash issue (reported by Himalaya Studios) were the major issues that prevented many titles being published on the Play store. After the summer I may have more time to look into this again, but right now I am sorely lacking in free time to spend on this.