[Android] Fix VlcDialog crash on orientation change

[Nicolas Pomepuy]

vlc-android | branch: 3.3.x | Nicolas Pomepuy <nicolas at videolabs.io> | Tue Nov 17 05:59:16 2020 +0000| [d465784108693daa84c604f1b24969594fba89b7] | committer: Nicolas Pomepuy

Fix VlcDialog crash on orientation change


(cherry picked from commit 1d82c851cd84e2db456ad134e2d9b1f1b23cf8fa)

> https://code.videolan.org/videolan/vlc-android/commit/d465784108693daa84c604f1b24969594fba89b7
---

 application/vlc-android/src/org/videolan/vlc/gui/dialogs/VlcDialog.kt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/application/vlc-android/src/org/videolan/vlc/gui/dialogs/VlcDialog.kt b/application/vlc-android/src/org/videolan/vlc/gui/dialogs/VlcDialog.kt
index dfc9891e3..8eceadabc 100644
--- a/application/vlc-android/src/org/videolan/vlc/gui/dialogs/VlcDialog.kt
+++ b/application/vlc-android/src/org/videolan/vlc/gui/dialogs/VlcDialog.kt
@@ -49,6 +49,7 @@ abstract class VlcDialog<T : Dialog, B : ViewDataBinding> : DialogFragment() {
     }
 
     override fun onCreateDialog(savedInstanceState: Bundle?): android.app.Dialog {
+        retainInstance = true
         val dialog = AppCompatDialog(activity, theme)
         dialog.setCancelable(true)
         dialog.setCanceledOnTouchOutside(true)