Software Update Manager: Address review comments

-- Address review comments and minor cosmetic issues
-- Retries are decoupled from scheduled queries. Retries will kick in when a
   software update fails upto a max. of
   WEAVE_DEVICE_CONFIG_SOFTWARE_UPDATE_MAX_RETRIES. After max retries,
   revert to schedule queries if enabled else do nothing till application
   manually triggers software update.
-- Corner case: Software Update is aborted by the application while
   handling an event callback.
   Test if attempt was aborted after calling the event handler. If
   aborted, set error to WEAVE_DEVICE_ERROR_SOFTWARE_UPDATE_ABORTED and
   handle it appropriately in SoftwareUpdateFailed.

Author: suryanshup

src/adaptations/device-layer/ESP32/ESP32Config.cpp

@@ -55,6 +55,7 @@ const ESP32Config::Key ESP32Config::kConfigKey_GroupKeyIndex           = { kConf
 const ESP32Config::Key ESP32Config::kConfigKey_LastUsedEpochKeyId      = { kConfigNamespace_WeaveConfig,  "last-ek-id"         };
 const ESP32Config::Key ESP32Config::kConfigKey_FailSafeArmed           = { kConfigNamespace_WeaveConfig,  "fail-safe-armed"    };
 const ESP32Config::Key ESP32Config::kConfigKey_WiFiStationSecType      = { kConfigNamespace_WeaveConfig,  "sta-sec-type"       };
+const ESP32Config::Key ESP32Config::kConfigKey_CertBodyId              = { kConfigNamespace_WeaveConfig,  "cert-body-id"       };
 
 // Prefix used for NVS keys that contain Weave group encryption keys.
 const char ESP32Config::kGroupKeyNamePrefix[]                        = "gk-";