audio: Ignore SIGPIPE in the default audio HAL wrapper

It could happen that a service process receives a SIGPIPE
while providing a dump due unexpected pipe closure on
the other side. This should not lead to a service
termination. Ignoring SIGPIPE is a normal practice for
system services.

Bug: 191123848
Test: adb shell kill -s 13 <pid-of-audio-hal>
Change-Id: I9c1d170b76aa27203206e8fd2ce2fc3f5431baac

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

@@ -16,6 +16,7 @@
 
 #define LOG_TAG "audiohalservice"
 
+#include <signal.h>
 #include <string>
 #include <vector>
 
@@ -45,6 +46,8 @@ static bool registerPassthroughServiceImplementations(Iter first, Iter last) {
 }
 
 int main(int /* argc */, char* /* argv */ []) {
+    signal(SIGPIPE, SIG_IGN);
+
     ::android::ProcessState::initWithDriver("/dev/vndbinder");
     // start a threadpool for vndbinder interactions
     ::android::ProcessState::self()->startThreadPool();