Android TV lmkd 低内存管理

当系统处于低内存时，lmkd会将一些前台apk kill掉，这时我们需要防止前台apk被kill。

修改 system\memory\lmkd\lmkd.cpp

static const char* const pAppWhitelist[] ={
    "com.antutu.benchmark.full",
    "com.antutu.ABenchMark",
    "com.netflix.mediaclient",
    "net.megogo.tv.preinstall",
    "com.movistarplus.androidtv",
    "com.amazon.avod.thirdpartyclient",
    "com.disney.disneyplus",
    "com.tencent.qqmusic",
    "iflix.play",
    "org.mozilla.tv.firefox",
    "com.instagram.android:mqtt",
};

static bool is_app_whitelist(char *task_name)
{
    unsigned int i = 0;
    for (i = 0; i < sizeof(pAppWhitelist)/sizeof(pAppWhitelist[0]); i++ ) {

        if (strlen(pAppWhitelist[i]) > strlen(task_name)) {
            if (strstr(pAppWhitelist[i], task_name)) {
                return true;
            }
        } else {
            if (strstr(task_name, pAppWhitelist[i])) {
                return true;
            }
        }
    }
    return false;
}

此外需要在kill_one_process调用kill_one_process

    if (is_app_whitelist(taskname)) {

        if (procp->oomadj <= PERCEPTIBLE_APP_ADJ) {
            ALOGI("Process in whitelist be preserved in LMKD: '%s' (%d), uid %d, oom_adj %d",
            taskname, pid, uid, procp->oomadj);
            pid_remove(pid);
            goto out;
        
    }