libcutils: use __android_log_is_debuggable()

#include <string.h>

#include <sys/types.h>

#include <android/log.h>

#include <cutils/compiler.h>

#include <cutils/properties.h>

#include <cutils/trace.h>

#include <private/android_logger.h>

/**

 * Maximum size of a message that can be logged to the trace buffer.

// Determine whether application-level tracing is enabled for this process.

static bool atrace_is_app_tracing_enabled()

{

    bool sys_debuggable = false;

    char value[PROPERTY_VALUE_MAX];

    bool sys_debuggable = __android_log_is_debuggable();

    bool result = false;

    // Check whether the system is debuggable.

    property_get("ro.debuggable", value, "0");

    if (value[0] == '1') {

        sys_debuggable = true;

    }

    if (sys_debuggable || atrace_is_debuggable) {

        // Check whether tracing is enabled for this process.

        FILE * file = fopen("/proc/self/cmdline", "re");