improve logout (#2579)

* improve logout

* fix tests

* add db migration

* delete wrongly committed file again

* improve LogoutUsecase

app/src/test/java/com/keylesspalace/tusky/ComposeActivityTest.kt

@@ -68,6 +68,8 @@ class ComposeActivityTest {
         id = 1,
         domain = instanceDomain,
         accessToken = "token",
+        clientId = "id",
+        clientSecret = "secret",
         isActive = true,
         accountId = "1",
         username = "username",

app/src/test/java/com/keylesspalace/tusky/components/timeline/CachedTimelineRemoteMediatorTest.kt

@@ -46,6 +46,8 @@ class CachedTimelineRemoteMediatorTest {
             id = 1,
             domain = "mastodon.example",
             accessToken = "token",
+            clientId = "id",
+            clientSecret = "secret",
             isActive = true
         )
     }

app/src/test/java/com/keylesspalace/tusky/components/timeline/NetworkTimelineRemoteMediatorTest.kt

@@ -38,6 +38,8 @@ class NetworkTimelineRemoteMediatorTest {
             id = 1,
             domain = "mastodon.example",
             accessToken = "token",
+            clientId = "id",
+            clientSecret = "secret",
             isActive = true
         )
     }