[ImgBot] Optimize images

*Total -- 2,669.52kb -> 2,502.70kb (6.25%)

/app/src/main/res/drawable/distance2.jpg -- 9.54kb -> 4.82kb (49.45%)
/screenshots/splash.jpg -- 132.13kb -> 117.71kb (10.91%)
/screenshots/favorites.jpg -- 380.37kb -> 353.21kb (7.14%)
/screenshots/detail.jpg -- 378.22kb -> 351.46kb (7.07%)
/app/src/main/res/mipmap-xxhdpi/ic_launcher.png -- 7.54kb -> 7.04kb (6.66%)
/screenshots/line_sort2.jpg -- 492.49kb -> 461.40kb (6.31%)
/screenshots/line_sort1.jpg -- 495.91kb -> 465.42kb (6.15%)
/app/src/main/res/mipmap-xhdpi/ic_launcher.png -- 4.73kb -> 4.46kb (5.76%)
/screenshots/main.jpg -- 351.69kb -> 333.32kb (5.22%)
/app/src/main/res/drawable/red_line.jpg -- 41.49kb -> 39.77kb (4.14%)
/app/src/main/res/drawable/orange_line.jpg -- 45.64kb -> 43.76kb (4.13%)
/app/src/main/res/drawable/yellow_line.jpg -- 40.56kb -> 38.94kb (3.99%)
/app/src/main/res/drawable/brown_line.jpg -- 43.86kb -> 42.20kb (3.8%)
/app/src/main/res/drawable/purple_line.jpg -- 38.95kb -> 37.73kb (3.13%)
/app/src/main/res/drawable/green_line.jpg -- 37.47kb -> 36.31kb (3.11%)
/app/src/main/res/drawable/blue_line.jpg -- 37.36kb -> 36.22kb (3.07%)
/app/src/main/res/mipmap-hdpi/ic_launcher.png -- 3.34kb -> 3.24kb (2.9%)
/app/src/main/res/drawable/southtonorth.jpg -- 36.33kb -> 35.34kb (2.72%)
/app/src/main/res/drawable/northtosouth.jpg -- 35.93kb -> 35.04kb (2.46%)
/app/src/main/res/mipmap-mdpi/ic_launcher.png -- 2.15kb -> 2.10kb (2.4%)
/app/src/main/res/drawable/heart_unfilled.jpg -- 28.68kb -> 28.27kb (1.42%)
/app/src/main/res/drawable/heart_filled.jpg -- 25.13kb -> 24.95kb (0.74%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>