Fix bad theme change for the MainActivity

CHANGES.md

@@ -8,7 +8,7 @@ Improvements 🙌:
  - Display the room shield in all room setting screens
 
 Bugfix 🐛:
- -
+ - Fix bad theme change for the MainActivity
 
 Translations 🗣:
  -

vector/src/main/java/im/vector/app/features/MainActivity.kt

@@ -43,6 +43,7 @@ import im.vector.app.features.popup.PopupAlertManager
 import im.vector.app.features.settings.VectorPreferences
 import im.vector.app.features.signout.hard.SignedOutActivity
 import im.vector.app.features.signout.soft.SoftLogoutActivity
+import im.vector.app.features.themes.ActivityOtherThemes
 import im.vector.app.features.ui.UiStateRepository
 import kotlinx.parcelize.Parcelize
 import kotlinx.coroutines.Dispatchers
@@ -83,6 +84,8 @@ class MainActivity : VectorBaseActivity<ActivityMainBinding>(), UnlockedActivity
 
     override fun getBinding() = ActivityMainBinding.inflate(layoutInflater)
 
+    override fun getOtherThemes() = ActivityOtherThemes.Launcher
+
     private lateinit var args: MainActivityArgs
 
     @Inject lateinit var notificationDrawerManager: NotificationDrawerManager

vector/src/main/java/im/vector/app/features/themes/ActivityOtherThemes.kt

@@ -31,6 +31,11 @@ sealed class ActivityOtherThemes(@StyleRes val dark: Int,
             R.style.AppTheme_Black
     )
 
+    object Launcher : ActivityOtherThemes(
+            R.style.AppTheme_Launcher,
+            R.style.AppTheme_Launcher
+    )
+
     object AttachmentsPreview : ActivityOtherThemes(
             R.style.AppTheme_AttachmentsPreview,
             R.style.AppTheme_AttachmentsPreview