Fix: should remember already reported events

vector/src/main/java/im/vector/app/features/analytics/DecryptionFailureTracker.kt

@@ -201,6 +201,10 @@ class DecryptionFailureTracker @Inject constructor(
             // already tracked
             return
         }
+        if (alreadyReported.contains(eventId)) {
+            // already reported
+            return
+        }
         val isOwnIdentityTrusted = session.cryptoService().crossSigningService().isCrossSigningVerified()
         val userHS = MatrixPatterns.extractServerNameFromId(session.myUserId)
         val messageSenderHs = event.senderId?.let {  MatrixPatterns.extractServerNameFromId(it) }

vector/src/test/java/im/vector/app/features/analytics/DecryptionFailureTrackerTest.kt

@@ -376,9 +376,12 @@ class DecryptionFailureTrackerTest {
         verify(exactly = 1) { fakeAnalyticsTracker.capture(any()) }
 
         decryptionFailureTracker.onEventDecryptionError(event, aUISIError)
-
         runCurrent()
 
+        // advance time by 7 seconds, to be ahead of the grace period
+        currentFakeTime += 7_000
+        fakeClock.givenEpoch(currentFakeTime)
+
         decryptionFailureTracker.onEventDecrypted(event, emptyMap())
         runCurrent()