Squashed commit of the following:

commit ce9fc4455093d4914dfec55a6e5003da3c28fc83
Author: Andrii Kalinich <AKalinich@luxoft.com>
Date:   Thu Aug 5 18:50:33 2021 -0400

    Update CUSTOM_BUTTON logic

commit 237562b555dc78322f6c6dd5b9c83ded0226998d
Author: Andrii Kalinich <AKalinich@luxoft.com>
Date:   Thu Aug 5 09:10:59 2021 -0400

    fixup! Address Livio comments

commit 16142947000f2ed54279306468a6c4cb1594805f
Author: Andrii Kalinich <AKalinich@luxoft.com>
Date:   Wed Aug 4 17:17:17 2021 -0400

    Address Livio comments

commit daa1060833441f38a7219d8a852c6d44e852e76e
Author: Andrii Kalinich <AKalinich@luxoft.com>
Date:   Tue Jul 27 20:15:06 2021 -0400

    Address Livio comments

commit a327f0694db958a1925b6526e8d25ce9c86bd735
Author: Olha Vorobiova <olha.vorobiova@dxc.com>
Date:   Tue Jul 20 16:40:27 2021 +0300

    Add unit tests for subscribe and unsubscribe button

commit dce94e5d84698f5d85bddbc8b5324518d4c1f9f4
Merge: f78f0c82ea 82703c98bb
Author: Andrii Kalinich (GitHub) <AKalinich@luxoft.com>
Date:   Fri Jul 16 19:12:45 2021 -0400

    Merge pull request #206 from LuxoftSDL/impl/sdl_0192_fix_resumption_of_button_subscriptions

    Separate subscription processing logic for mobile requests and resumption

commit 82703c98bb2b68c11bfc642bc976d7b29be416c8
Author: Andrii Kalinich <AKalinich@luxoft.com>
Date:   Fri Jul 16 15:07:15 2021 -0400

    Return on_event() back to HMI subscription request

commit f78f0c82ea495376298dae5efda25dde05a7ec7b
Merge: 94c770b314 e7e1ebf3ce
Author: Andrii Kalinich (GitHub) <AKalinich@luxoft.com>
Date:   Fri Jul 16 19:00:15 2021 -0400

    Merge pull request #205 from LuxoftSDL/fix/sdl_0192_fix_custom_button_subscription_logic

    Fix CUSTOM_BUTTON subscription logic

commit e7e1ebf3ce7b49139f3ddfb77046a642d049294e
Author: Andrii Kalinich <AKalinich@luxoft.com>
Date:   Fri Jul 16 13:02:46 2021 -0400

    Fix affected unit tests

commit d156a9f0067a61b32323b1e0eae680e488780045
Author: Yana Chernysheva <ychernysheva@luxoft.com>
Date:   Fri Jul 16 16:09:27 2021 +0300

    Separate subscription processing for mobile requests and resumption

commit 9e461d05d2843dedb4a3e3945d907d6e8a376311
Author: Andrii Kalinich <AKalinich@luxoft.com>
Date:   Fri Jul 16 01:31:05 2021 -0400

    Fix CUSTOM_BUTTON subscription logic

    Was removed subscription to custom button by default.
    Also, added check if app is actually subscribed to
    CUSTOM_BUTTON like for all other buttons.

commit 94c770b314659a33555d81bd47e4c76325c322eb
Author: Yana Chernysheva <ychernysheva@luxoft.com>
Date:   Wed Jul 14 15:32:40 2021 +0300

    Revert expired button requests if response was received after timeout

commit de6c7aac0650d6ac823cd3e6cc0ff4ff9d96eef9
Merge: 0343ea4e9f eaec9b47a5
Author: Yana Chernysheva <ychernysheva@luxoft.com>
Date:   Thu Jul 15 15:23:10 2021 +0300

    Merge branch 'develop' into feature/sdl_0192_button_subscription_response_from_hmi

commit 0343ea4e9f2ef844aa096f76b85719f66eb6db36
Author: Yana Chernysheva <ychernysheva@luxoft.com>
Date:   Mon Jul 5 14:46:21 2021 +0300

    Add shared base class for mobile button notifications

commit 3d7d670476634bf687271dd5a5ebc95b907cab05
Author: Yana Chernysheva <ychernysheva@luxoft.com>
Date:   Fri Jul 9 16:13:21 2021 +0300

    Unify approach to result codes processing

commit e5dfa88fbddd3ec71c05e3e49f68379470e24233
Author: Yana Chernysheva <ychernysheva@luxoft.com>
Date:   Thu Jul 8 11:40:13 2021 +0300

    Remove OnButtonSubscription notification

commit 06dc97859063cfc8a654365db3396a8752cb4f9b
Author: Yana Chernysheva <ychernysheva@luxoft.com>
Date:   Wed Jul 7 13:39:12 2021 +0300

    Resume button subscriptions

commit 4cf9954b46c0496356200ce0d2c4a96ace5e0b6d
Author: Vadym Luchko (GitHub) <76956836+VadymLuchko@users.noreply.github.com>
Date:   Fri Jul 9 14:09:43 2021 +0300

    unsubscribe buttons implementation (#197)

commit 13045471a9de73b8a37d081efbbe31b1552aa159
Author: Yana Chernysheva <ychernysheva@luxoft.com>
Date:   Wed Jun 30 17:16:30 2021 +0300

    Add SubscribeButtonRequest and SubscribeButtonResponse classes

1 files changed, 4 insertions, 3 deletions

diff --git a/src/components/application_manager/rpc_plugins/app_service_rpc_plugin/src/commands/hmi/as_get_app_service_data_request_from_hmi.cc b/src/components/application_manager/rpc_plugins/app_service_rpc_plugin/src/commands/hmi/as_get_app_service_data_request_from_hmi.cc
index 989c606085..25f389abd0 100644
--- a/src/components/application_manager/rpc_plugins/app_service_rpc_plugin/src/commands/hmi/as_get_app_service_data_request_from_hmi.cc
+++ b/src/components/application_manager/rpc_plugins/app_service_rpc_plugin/src/commands/hmi/as_get_app_service_data_request_from_hmi.cc
@@ -240,8 +240,8 @@ void ASGetAppServiceDataRequestFromHMI::on_event(
   hmi_apis::Common_Result::eType result =
       static_cast<hmi_apis::Common_Result::eType>(
           event_message[strings::params][hmi_response::code].asInt());
-  bool success =
-      IsHMIResultSuccess(result, HmiInterfaces::HMI_INTERFACE_AppService);
+  bool success = CommandImpl::IsHMIResultSuccess(
+      result, HmiInterfaces::HMI_INTERFACE_AppService);
   if (ValidateResponse(msg_params)) {
     SendResponse(success,
                  correlation_id(),
@@ -263,7 +263,8 @@ void ASGetAppServiceDataRequestFromHMI::on_event(
           msg_params[strings::result_code].asInt());
   hmi_apis::Common_Result::eType result =
       MessageHelper::MobileToHMIResult(mobile_result);
-  bool success = IsMobileResultSuccess(mobile_result);
+  bool success =
+      application_manager::commands::IsMobileResultSuccess(mobile_result);
 
   if (ValidateResponse(msg_params)) {
     SendResponse(success,