feat: build default assets instead of downloading and v2 tables for esp-hi, echoear (#1203)

* fix: call flush ready on io ready

* eachear: update to v2 partition table but disable class Assets currently

* stop gif if previewing an image

* feat: build default assets instead of downloading

* version updates

* fix None error

* delay 1s before enter wifi config mode

* fix compiling with v1 partition table

---------

Co-authored-by: Xiaoxia <terrence.huang@tenclass.com>

main/boards/echoear/config.json

@@ -4,7 +4,6 @@
         {
             "name": "echoear",
             "sdkconfig_append": [
-                "CONFIG_PARTITION_TABLE_CUSTOM_FILENAME=\"partitions/v1/16m_echoear.csv\""
             ]
         }
     ]