Add audioloader

Setting the l_effect_tdm_framework_enable=true parameter enables the quad speakers. However, the sound quality is unusable, probably because on stock it's configured by lib_SoundBooster_TDM_ver100.so which is missing here as I can't find a way to make it load on LineageOS.

audioloader/Android.mk

@@ -0,0 +1,19 @@
+# Copyright (C) 2018 The LineageOS Project
+# SPDX-License-Identifier: Apache-2.0
+
+LOCAL_PATH:= $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= audioloader.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+    libutils \
+    libaudioclient
+
+LOCAL_MODULE:= audioloader
+LOCAL_MODULE_TAGS:= optional
+
+LOCAL_INIT_RC := audioloader.rc
+
+include $(BUILD_EXECUTABLE)

audioloader/audioloader.cpp

@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2018 The LineageOS Project
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <media/AudioSystem.h>
+
+int main(int, char**)
+{
+    android::AudioSystem::setParameters(0, android::String8("l_effect_tdm_framework_enable=true"));
+    return 0;
+}

audioloader/audioloader.rc

@@ -0,0 +1,8 @@
+service audioloader /system/bin/audioloader
+    user system
+    group audio
+    disabled
+    oneshot
+
+on property:init.svc.audioserver=running
+#    start audioloader

device.mk

@@ -97,7 +97,8 @@ PRODUCT_PACKAGES += \
     libqcomvisualizer \
     libqcomvoiceprocessing \
     libqcompostprocbundle \
-    tinymix
+    tinymix \
+    audioloader
 
 # Audio features
 PRODUCT_PACKAGES += \