Add SessionData.needsVerification field (#2672)

* Add `SessionData.needsVerification`:
  - Allows us to add a skip button for debug builds.
  - We can have the verification state almost instantly.
  - It doesn't depend on network availability to know the verification state and display the UI.
* Add DB migration.
- Make the skip button in the verification flow skip the whole flow including the completed screen.
- Save the session as verified in `RustEncryptionService.recover(recoveryKey)`.
* Enforce session verification for existing users too.
* Fix verification confirmed screen subtitle (typo in id, was using the wrong string)
* Update screenshots

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Co-authored-by: ElementBot <benoitm+elementbot@element.io>

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/verification/SessionVerificationService.kt

@@ -21,6 +21,17 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.StateFlow
 
 interface SessionVerificationService {
+    /**
+     * This flow stores the local verification status of the current session.
+     *
+     * We should ideally base the verified status in the Rust SDK info, but there are several issues with that approach:
+     *
+     * - The SDK takes a while to report this value, resulting in a delay of 1-2s in displaying the UI.
+     * - We need to add a 'Skip' option for testing purposes, which would not be possible if we relied only on the SDK.
+     * - The SDK sometimes doesn't report the verification state if there is no network connection when the app boots.
+     */
+    val needsVerificationFlow: StateFlow<Boolean>
+
     /**
      * State of the current verification flow ([VerificationFlowState.Initial] if not started).
      */
@@ -72,6 +83,11 @@ interface SessionVerificationService {
      * Returns the verification service state to the initial step.
      */
     suspend fun reset()
+
+    /**
+     * Saves the current session state as [verified].
+     */
+    suspend fun saveVerifiedState(verified: Boolean)
 }
 
 /** Verification status of the current session. */