fix: ESP-HI audio sampling problem

[78]

This pull request introduces enhancements to the AdcPdmAudioCodec class for improved audio output control and stability, particularly by integrating a timer-based mechanism to automatically disable output after a period of inactivity. Additionally, it adds configuration flexibility for PDM upsampling, and includes some minor improvements to display and configuration files.

Audio output control and stability improvements:

• Added an esp_timer-based mechanism to AdcPdmAudioCodec that starts a timer when audio output is enabled or data is written; the timer disables output after a 120ms timeout to prevent unwanted continuous audio output. Timer is properly created, started, stopped, and deleted as needed. (adc_pdm_audio_codec.cc, adc_pdm_audio_codec.h) [1] [2] [3] [4] [5]
• Ensured that PDM TX clock's up_sample_fs parameter is always set according to board configuration, overriding third-party library defaults, for consistent audio performance. (adc_pdm_audio_codec.cc) [1] [2]

Configuration and flexibility:

• Introduced AUDIO_PDM_UPSAMPLE_FS macro in config.h to allow easy adjustment of the PDM upsampling factor, improving device compatibility and audio quality. (config.h)
• Included config.h in adc_pdm_audio_codec.cc to access new configuration macros.

Minor improvements:

• Set explicit task priority and stack size for the emoji animation player to ensure reliable operation. (emoji_display.cc)
• Added a stub override for SetChatMessage in EmojiWidget for interface completeness. (emoji_display.h)
• Removed an unused configuration option from config.json for cleanup. (config.json)
• Removed a device state change callback in esp_hi.cc that previously toggled audio output, likely superseded by the new timer-based approach. (esp_hi.cc)

[78]

@espressif2022 修复了 sample rate 不正确的问题，但是还存在哒哒哒的干扰声。这个是来自于电路上的干扰信号？

附件：test.wav

[espressif2022]

@espressif2022 修复了 sample rate 不正确的问题，但是还存在哒哒哒的干扰声。这个是来自于电路上的干扰信号？

附件：test.wav

IDF 需要打一个补丁

[78]

@espressif2022 修复了 sample rate 不正确的问题，但是还存在哒哒哒的干扰声。这个是来自于电路上的干扰信号？
附件：test.wav

IDF 需要打一个补丁

目前我提交的这个方案也是可以解决的，GPT5分析了代码后写的修复方案。

        ESP_ERROR_CHECK(esp_codec_dev_open(output_dev_, &fs));
        ESP_ERROR_CHECK(esp_codec_dev_set_out_vol(output_dev_, output_volume_));

        // 强制按板卡配置重配PDM TX时钟，覆盖第三方库在set_fmt中的默认up_sample_fs
        // 若通道已启用，先禁用再重配，最后再启用
        ESP_ERROR_CHECK_WITHOUT_ABORT(i2s_channel_disable(tx_handle_));
        i2s_pdm_tx_clk_config_t clk_cfg = I2S_PDM_TX_CLK_DEFAULT_CONFIG((uint32_t)output_sample_rate_);
        clk_cfg.up_sample_fs = AUDIO_PDM_UPSAMPLE_FS;
        ESP_ERROR_CHECK(i2s_channel_reconfig_pdm_tx_clock(tx_handle_, &clk_cfg));
        ESP_ERROR_CHECK(i2s_channel_enable(tx_handle_));
        if(pa_ctrl_pin_ != GPIO_NUM_NC){
            gpio_set_level(pa_ctrl_pin_, 1);
        }