This adds a minimal launcher activity for the android app, which does the followings: - Opens a file chooser to let user select a zip file - Extracts the zip into the app's internal storage - Launches the SDL activity
Now fonts/ directory is bundled in APK as assets. TTF_OpenFont() can open files in Android assets, but cannot handle the "./" path prefix.
This sets up Gradle / CMake rules for Android build.
This just copies android-project/ directory of https://hg.libsdl.org/SDL/ (rev 13383) to android/.
kichikuou