Update megaphone backup criteria

Author: kate-signal

SignalServiceKit/Megaphones/ExperienceUpgradeManifest.swift

@@ -458,7 +458,7 @@ extension ExperienceUpgradeManifest {
         case .backupKeyReminder:
             return 8 * .hour
         case .enableBackupsReminder:
-            return 8 * .hour
+            return 7 * .day
         case .unrecognized:
             return .infinity
         }
@@ -688,8 +688,7 @@ extension ExperienceUpgradeManifest {
             break
         }
 
-        // if user has sent/received 1000 messages
-        return InteractionFinder.outgoingAndIncomingMessageCount(transaction: transaction, limit: 1000) >= 1000
+        return InteractionFinder.outgoingAndIncomingMessageCount(transaction: transaction, limit: 1) >= 1
     }
 
     // MARK: Remote megaphone preconditions

SignalServiceKit/tests/MessageBackup/BackupEnablementReminderMegaphoneTests.swift

@@ -47,13 +47,6 @@ class BackupEnablementReminderMegaphoneTests: XCTestCase {
             backupSettingsStore.setBackupPlan(.disabled, tx: tx)
         }
 
-        let outgoingMessage = TSOutgoingMessage(in: contactThread!, messageBody: "good heavens")
-        db.write { transaction in
-            let db = transaction.database
-            try! contactThread!.asRecord().insert(db)
-            try! outgoingMessage.asRecord().insert(db)
-        }
-
         db.read { transaction in
             XCTAssertFalse(ExperienceUpgradeManifest.checkPreconditionsForBackupEnablementReminder(transaction: transaction), "Don't show reminder if user doesn't have enough messages")
         }