RK平台HDMI、喇叭音频同时输出

HDMI、喇叭音频同时输出

Android默认音频输出逻辑，不接HDMI默认喇叭音频输出，若检测到HDMI接入后，关闭喇叭输出，开启HDMI音频输出

BOX产品的使用场景需要插入HDMI后，喇叭仍然输出，可加入此补丁

方案一

适用平台：RK3399 Android8.1

$ vim frameworks/base/services/core/java/com/android/server/WiredAccessoryManager.java

            // If the kernel does not have an "hdmi_audio" switch, just fall back on the older
            // "hdmi" switch instead.
-            uei = new UEventInfo(NAME_HDMI_AUDIO, BIT_HDMI_AUDIO, 0);
+/*            uei = new UEventInfo(NAME_HDMI_AUDIO, BIT_HDMI_AUDIO, 0)