Add fastlane metadata

fastlane/metadata/android/en-US/changelogs/24.txt

+v1.0.15
+- new encryption algorithm
+- timeline thumbnails
+- thumbhash for timeline placeholders
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fastlane/metadata/android/en-US/full_description.txt

+Circles combines the ease of use and convenience of an online social network with the privacy and security of an encrypted messenger.
+
+All posts are encrypted end-to-end, and there are no ads and no tracking.
+
+Connect with the people who truly matter in your life, without creepy ad networks spying on every interaction.
+
+Safely share photos of your kids with grandparents, aunts and uncles, friends and other family members.
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fastlane/metadata/android/en-US/short_description.txt

+Secure social sharing for friends and families
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fastlane/metadata/android/en-US/title.txt

+Circles
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