res: drawable: Launcher icon for upcoming Android release

Android's new material design emphasizes flat icons.

Optimize icons using lossy compression via:
    https://github.com/SyNtheticNightmar3/optimize_png
Total Results:
    Old size: 59843 bytes
    New size: 26223 bytes
    Reduced:  33620 bytes (43.81% of original total size)
Merge pull request #5 from SyNtheticNightmar3/icon

New Launcher Icon