Merge "NetworkPolicy: Replace fake allLocks"

 * enforcement.

 *

 * <p>

 * This class uses 2-3 locks to synchronize state:

 * This class uses 2 locks to synchronize state:

 * <ul>

 * <li>{@code mUidRulesFirstLock}: used to guard state related to individual UIDs (such as firewall

 * rules).

 * <li>{@code mNetworkPoliciesSecondLock}: used to guard state related to network interfaces (such

 * as network policies).

 * <li>{@code allLocks}: not a "real" lock, but an indication (through @GuardedBy) that all locks

 * must be held.

 * </ul>

 *

 * <p>

    final Object mUidRulesFirstLock = new Object();

    final Object mNetworkPoliciesSecondLock = new Object();

    @GuardedBy("allLocks") volatile boolean mSystemReady;

    @GuardedBy({"mUidRulesFirstLock", "mNetworkPoliciesSecondLock"})

    volatile boolean mSystemReady;

    @GuardedBy("mUidRulesFirstLock") volatile boolean mRestrictBackground;

    @GuardedBy("mUidRulesFirstLock") volatile boolean mRestrictPower;

    private final ServiceThread mUidEventThread;

    @GuardedBy("allLocks")

    @GuardedBy({"mUidRulesFirstLock", "mNetworkPoliciesSecondLock"})

    private final AtomicFile mPolicyFile;

    private final AppOpsManager mAppOps;