android, desktop: landscape calls on Android and better local camera ratio management (#5124)

* android, desktop: landscape calls on Android and better local camera ratio management

The main thing is that now when exiting from CallActivity while in call
audio devices are not reset to default. It allows to have landscape mode
enabled

* styles

* fix changing calls

apps/multiplatform/android/src/main/AndroidManifest.xml

@@ -115,7 +115,6 @@
         android:launchMode="singleInstance"
         android:supportsPictureInPicture="true"
         android:autoRemoveFromRecents="true"
-        android:screenOrientation="portrait"
         android:configChanges="screenSize|smallestScreenSize|screenLayout|orientation"/>
 
     <provider

apps/multiplatform/android/src/main/java/chat/simplex/app/SimplexApp.kt

@@ -360,6 +360,8 @@ class SimplexApp: Application(), LifecycleEventObserver {
         return true
       }
 
+      override fun androidCreateActiveCallState(): Closeable = ActiveCallState()
+
       override val androidApiLevel: Int get() = Build.VERSION.SDK_INT
     }
   }