Set default value for 'better_social_sharing_buttons_active' field per node type

Problem/Motivation

Using Entity API programmatically, when default state for sharing buttons per node is activated (better_social_sharing_buttons_per_node submodule), node was created with value FALSE for better_social_sharing_buttons_active field and not with default state for sharing buttons per node of node type.

Steps to reproduce

• Activate better_social_sharing_buttons and better_social_sharing_buttons_per_node modules
• From node type edition, "/admin/structure/types/manage/a_node_type", see _better_social_sharing_buttons_configured_node_type.png screenshot
• Check Enable Social Sharing Buttons and Allow to enable/disable sharing buttons per node properties
• Choose Enabled for Default state for sharing buttons per node property
• Execute Node::create([ 'type' => 'a_node_type', 'title' => 'A title', 'status' => 1, 'uid' => 1, ])->save();
• Go to the created content and see that Display the social sharing buttons property is not checked, see _better_social_sharing_buttons_created_node.png screenshot

Proposed resolution

Adding a hook hook_entity_bundle_field_info in order to set default value for better_social_sharing_buttons_active field of node depending on default state for sharing buttons per node configured for the node type.