Revert "Performance: SystemServer: Move sensor init to a new thread."

namespace android {

void* sensorInit(void *arg) {

    ALOGI("System server: starting sensor init.\n");

    // Start the sensor service

    SensorService::instantiate();

    ALOGI("System server: sensor init done.\n");

    return NULL;

}

static void android_server_SystemServer_startSensorService(JNIEnv* /* env */, jobject /* clazz */) {

    char propBuf[PROPERTY_VALUE_MAX];

    pthread_t sensor_init_thread;

    property_get("system_init.startsensorservice", propBuf, "1");

    if (strcmp(propBuf, "1") == 0) {

        // We are safe to move this to a new thread because

        // Android frame work has taken care to check whether the

        // service is started or not before using it.

        pthread_create( &sensor_init_thread, NULL, &sensorInit, NULL);

        // Start the sensor service

        SensorService::instantiate();

    }

}