安卓 CPU 测试命令

1. 个数
    cat /sys/devices/system/cpu/present

2. 支持的频率
    cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

3. 启动温控  _max_freq > _cur_freq
    cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
    cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq