[ImgBot] Optimize images

*Total -- 174.86kb -> 153.98kb (11.94%)

/app/src/main/android_locked-web.png -- 157.11kb -> 137.14kb (12.71%)
/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -- 7.54kb -> 7.04kb (6.66%)
/app/src/main/res/mipmap-xhdpi/ic_launcher.png -- 4.73kb -> 4.46kb (5.76%)
/app/src/main/res/mipmap-hdpi/ic_launcher.png -- 3.34kb -> 3.24kb (2.9%)
/app/src/main/res/mipmap-mdpi/ic_launcher.png -- 2.15kb -> 2.10kb (2.4%)

Author: ImgBotApp