title: How to disable HDMI CEC in aosp build?
body: <p>I have Android 7.1 SDK and I want to set CEC disabled by default. (Now the default is 'on')
  I saw this <a href="https://stackoverflow.com/questions/16770639/how-do-i-set-the-default-properties-in-an-aosp-build">question</a> but CEC is not there.  Also there is some cec files in these paths but they don't config CEC and are only sources:</p>
  
  <pre><code>&gt; ./vendor/amlogic/frameworks/services/hdmicec/libhdmi_cec/HdmiCecControl.cpp
  &gt; ./hardware/libhardware/include/hardware/hdmi_cec.h
  &gt; ./common/drivers/amlogic/cec/hdmi_ao_cec.c
  </code></pre>
  
  <p>Please tell me how to do this.</p>