Add alert to encrypted rooms with visible history (Android). (#5709)

* feat: Add visible history alert to encrypted rooms.

- Adds a dismissable alert that is displayed whenever the user opens a
  room with `history_visibility` != `joined`. When cleared, this is
  recorded in the app's data store.
- When opening a room with `history_visibility` = `joined`, this flag is
  cleared.`

Issue: https://github.com/element-hq/element-meta/issues/2875

* chore: Fix linting issues.

* feat: Move alert showing logic into state presenter.

* chore: Fix linting issues.

* tests: Fixup tests.

* feat: Use real link.

* chore: Update license header.

* chore: Add (c) to license headers.

* chore: Add `.` to license header.

* feat: Lock alert behind history sharing developer setting.

* ci: Trigger record screenshots

* feat: Create repo key using session ID for multi-account support.

* feat: Use session ID hash for constructing data store.

* tests: Correct and update tests.

* tests: Update snapshots.

* feat: Prevent identity alert from displaying with history visibility alert.

* feat: Tidy up HistoryVisibleStatePresenter logic, update previews.

* chore: Remove unused import.

* chore: Update screenshots.

* feat: Add translation string.

* chore: Remove redundant temporary translation file.

appconfig/src/main/kotlin/io/element/android/appconfig/LearnMoreConfig.kt

@@ -13,4 +13,5 @@ object LearnMoreConfig {
     const val DEVICE_VERIFICATION_URL: String = "https://element.io/help#encryption-device-verification"
     const val SECURE_BACKUP_URL: String = "https://element.io/help#encryption5"
     const val IDENTITY_CHANGE_URL: String = "https://element.io/help#encryption18"
+    const val HISTORY_VISIBLE_URL: String = "https://element.io/en/help#e2ee-history-sharing"
 }