Limit number of contacts for Android's "Quick Share"

Work around a bug in Android which lead to very non recent contacts showing up in Android's "Quick Share" overlay. Also increase privacy by leaking less conversation names to the Android UI.

Fixes #13398

app/src/main/java/org/thoughtcrime/securesms/util/ConversationUtil.java

@@ -142,7 +142,7 @@ public static void clearShortcuts(@NonNull Context context, @NonNull Collection<
   }
 
   public static int getMaxShortcuts(@NonNull Context context) {
-    return Math.min(ShortcutManagerCompat.getMaxShortcutCountPerActivity(context), 150);
+    return Math.min(ShortcutManagerCompat.getMaxShortcutCountPerActivity(context), 10);
   }
 
   /**