chore: Add changelog for v1.7.0

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

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+🐛 Bug Fixes
+- Hide contact and bio fields in organizer details if null
+- Prevent event details from showing in nav drawer when no event is selected
+- Use correct values for tickets, sales and orders
+- Use correct policy links and change Cookie Policy to Refund Policy
+- Prevent Account section's action bar title from changing
+- Display user friendly error message for wrong credential
+- Use confirmed sessions instead of accepted session
+- Use confirmed speakers instead of accepted speakers
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+🧰 Maintenance
+- Rename Device Settings and Event Settings
+- Shift Event Creation and Publish features to Developer Mode