[ImgBot] Optimize images (#485)

*Total -- 32.98kb -> 20.64kb (37.43%)

/app/src/main/res/drawable-xxxhdpi/ic_content_copy.png -- 1.30kb -> 0.61kb (52.75%)
/app/src/main/res/drawable-nodpi/autofill_ins_2.png -- 6.69kb -> 3.97kb (40.69%)
/app/src/main/res/drawable-nodpi/autofill_ins_1.png -- 11.65kb -> 7.15kb (38.61%)
/app/src/main/res/drawable-nodpi/autofill_ins_3.png -- 10.47kb -> 6.48kb (38.18%)
/app/src/main/res/drawable-xxhdpi/ic_content_copy.png -- 0.80kb -> 0.50kb (37.76%)
/app/src/main/res/drawable-xhdpi/ic_content_copy.png -- 0.55kb -> 0.47kb (13.73%)
/app/src/main/res/drawable-xxhdpi/ic_action_secure.png -- 0.61kb -> 0.57kb (7.21%)
/app/src/main/res/drawable-hdpi/ic_content_copy.png -- 0.41kb -> 0.40kb (2.84%)
/app/src/main/res/drawable-xhdpi/ic_action_secure.png -- 0.50kb -> 0.49kb (1.37%)

Author: msfjarvis