[android] Fix corner radius of DialogFragment

Signed-off-by: Jean-Baptiste <jeanbaptiste.charron@outlook.fr>

android/app/src/main/java/app/organicmaps/bookmarks/ChooseBookmarkCategoryFragment.java

@@ -42,7 +42,7 @@ public class ChooseBookmarkCategoryFragment
   public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
   {
     View root = inflater.inflate(R.layout.choose_bookmark_category_fragment, container, false);
-    getDialog().getWindow().setBackgroundDrawableResource(android.R.color.transparent);
+    getDialog().getWindow().setBackgroundDrawableResource(R.drawable.bg_transparent_dlg);
     mRecycler = root.findViewById(R.id.recycler);
     mRecycler.setLayoutManager(new LinearLayoutManager(requireActivity()));
     return root;

android/app/src/main/java/app/organicmaps/bookmarks/ChooseBookmarksSortingTypeFragment.java

@@ -77,7 +77,7 @@ public class ChooseBookmarksSortingTypeFragment
   public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState)
   {
     super.onViewCreated(view, savedInstanceState);
-    getDialog().getWindow().setBackgroundDrawableResource(android.R.color.transparent);
+    getDialog().getWindow().setBackgroundDrawableResource(R.drawable.bg_transparent_dlg);
 
     final Bundle args = getArguments();
     if (args == null)

android/app/src/main/java/app/organicmaps/widget/StackedButtonsDialog.java

@@ -61,7 +61,7 @@ public class StackedButtonsDialog extends AppCompatDialog implements View.OnClic
     setCancelable(mCancelable);
     setOnCancelListener(mCancelListener);
     setContentView(R.layout.dialog_stacked_buttons);
-    getWindow().setBackgroundDrawableResource(android.R.color.transparent);
+    getWindow().setBackgroundDrawableResource(R.drawable.bg_transparent_dlg);
 
     TextView title = findViewById(R.id.tv__title);
     UiUtils.setTextAndHideIfEmpty(title, mTitle);

android/app/src/main/res/drawable/bg_transparent_dlg.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="@android:color/transparent"/>
+    <corners android:radius="28dp"/>
+</shape>