Update minimum SDK version to 4.0
Update minimum SDK version to 4.0

abstractj/freeotp-android,npmccallum/freeotp-android,tfasz/otp,iamale/time1-android,freeotp/freeotp-android,codemonkey85/FreeOTP-Android,czchen/freeotp,fidesmo/free-otp,helloworld1/FreeOTPPlus,brad/freeotp,juanjcsr/FreeOTP,Dazzozo/freeotp,alexschneider/LibreOTP,secondsun/freeotp,helloworld1/FreeOTPPlus,zhaofengli/freeotp-fork,yanchou/https-git.fedorahosted.org-git-freeotp-android,jharting/freeotp,gregorlarson/safeotp,biddyweb/OTP2FA,helloworld1/FreeOTPPlus,relrod/FreeOTP-fork