audio: use binder threadpool

Support to communicate with other service with AIDL interface.

Bug: 215463744
Test: build pass

Signed-off-by: Jasmine Cha <chajasmine@google.com>
Change-Id: I13da2121623779b0ba21d29cf39c11abc7b96dd9

audio/common/all-versions/default/service/Android.bp

@@ -52,6 +52,7 @@ cc_binary {
     shared_libs: [
         "libcutils",
         "libbinder",
+        "libbinder_ndk",
         "libhidlbase",
         "liblog",
         "libutils",

audio/common/all-versions/default/service/service.cpp

@@ -20,6 +20,7 @@
 #include <string>
 #include <vector>
 
+#include <android/binder_process.h>
 #include <binder/ProcessState.h>
 #include <cutils/properties.h>
 #include <hidl/HidlTransportSupport.h>
@@ -52,6 +53,9 @@ int main(int /* argc */, char* /* argv */ []) {
     // start a threadpool for vndbinder interactions
     ::android::ProcessState::self()->startThreadPool();
 
+    ABinderProcess_setThreadPoolMaxThreadCount(1);
+    ABinderProcess_startThreadPool();
+
     const int32_t defaultValue = -1;
     int32_t value =
         property_get_int32("persist.vendor.audio.service.hwbinder.size_kbyte", defaultValue);