Extract title image from IWAD and display in IWAD selection

[nvllsvm]

The title screen images uses on the IWAD selection screen should be extracted from the IWAD. Preferably using the native GZDoom code.

Below is a screenshot of where the asset should then be used.

Note that at one point, these assets were included in the release of GZDoom for Android. To avoid potential copyright bullshit, they have been removed.

[Wuerfel21]

Maybe load the TITLEPIC straight from the IWAD?

[nvllsvm]

Proprietary assets have been removed. Looks really ugly without the assets.

@Wuerfel21 - Yep, something along the lines of that is what I plan on doing. I'd like to use JNI and native GZDoom code to determine the title screen from the IWAD.