Add back bintray uploads
Add back bintray uploads

Their API and plugin are both in bad shape and I don't want to deal with it

bugsnag/bugsnag-android-gradle-plugin,bugsnag/bugsnag-android-gradle-plugin,bugsnag/bugsnag-android-gradle-plugin,bugsnag/bugsnag-android-gradle-plugin,bugsnag/bugsnag-android-gradle-plugin,bugsnag/bugsnag-android-gradle-plugin