Bump version to 2.7.3-beta and update fastlane metadata

fastlane/metadata/android/af-ZA/full_description.txt

fastlane/metadata/android/ar-SA/full_description.txt

fastlane/metadata/android/bg-BG/full_description.txt

fastlane/metadata/android/ca-ES/full_description.txt

fastlane/metadata/android/cs-CZ/full_description.txt

fastlane/metadata/android/da-DK/full_description.txt

fastlane/metadata/android/de-DE/full_description.txt

fastlane/metadata/android/el-GR/full_description.txt

fastlane/metadata/android/en-US/changelogs/143.txt

fastlane/metadata/android/en-US/full_description.txt

fastlane/metadata/android/es-ES/full_description.txt

fastlane/metadata/android/es-US/full_description.txt

fastlane/metadata/android/fi-FI/full_description.txt

fastlane/metadata/android/fr-FR/full_description.txt

fastlane/metadata/android/he-IL/full_description.txt

fastlane/metadata/android/hu-HU/full_description.txt

fastlane/metadata/android/id-ID/full_description.txt

fastlane/metadata/android/it-IT/full_description.txt

fastlane/metadata/android/ja-JP/full_description.txt

fastlane/metadata/android/ko-KR/full_description.txt