Improve app metadata, include fdroid metadata in repository

android/gradle.properties

fastlane/metadata/android/en-US/changelogs/0.txt

fastlane/metadata/android/en-US/changelogs/1.txt

fastlane/metadata/android/en-US/changelogs/10.txt

fastlane/metadata/android/en-US/changelogs/11.txt

fastlane/metadata/android/en-US/changelogs/12.txt

fastlane/metadata/android/en-US/changelogs/13.txt

fastlane/metadata/android/en-US/changelogs/14.txt

fastlane/metadata/android/en-US/changelogs/15.txt

fastlane/metadata/android/en-US/changelogs/16.txt

fastlane/metadata/android/en-US/changelogs/17.txt

fastlane/metadata/android/en-US/changelogs/18.txt

fastlane/metadata/android/en-US/changelogs/19.txt

fastlane/metadata/android/en-US/changelogs/2.txt

fastlane/metadata/android/en-US/changelogs/3.txt

fastlane/metadata/android/en-US/changelogs/4.txt

fastlane/metadata/android/en-US/changelogs/5.txt

fastlane/metadata/android/en-US/changelogs/6.txt

fastlane/metadata/android/en-US/changelogs/7.txt

fastlane/metadata/android/en-US/changelogs/8.txt