Merge "IAudioFlinger: create Audio Policy Service before calling AudioFlinger"

#include <binder/IPCThreadState.h>

#include <binder/Parcel.h>

#include <media/IAudioPolicyService.h>

#include <mediautils/ServiceUtilities.h>

#include <mediautils/TimeCheck.h>

#include "IAudioFlinger.h"

    std::string tag("IAudioFlinger command " + std::to_string(code));

    TimeCheck check(tag.c_str());

    // Make sure we connect to Audio Policy Service before calling into AudioFlinger:

    //  - AudioFlinger can call into Audio Policy Service with its global mutex held

    //  - If this is the first time Audio Policy Service is queried from inside audioserver process

    //  this will trigger Audio Policy Manager initialization.

    //  - Audio Policy Manager initialization calls into AudioFlinger which will try to lock

    //  its global mutex and a deadlock will occur.

    if (IPCThreadState::self()->getCallingPid() != getpid()) {

        AudioSystem::get_audio_policy_service();

    }

    switch (code) {

        case CREATE_TRACK: {

            CHECK_INTERFACE(IAudioFlinger, data, reply);