Merge "Fix a bug in the USAP Pool refill logic." am: 905c2570 am: 8151e4c8

                long elapsedTimeMs = System.currentTimeMillis() - mUsapPoolRefillTriggerTimestamp;

                if (elapsedTimeMs >= mUsapPoolRefillDelayMs) {

                    // Normalize the poll timeout value when the time between one poll event and the

                    // next pushes us over the delay value.  This prevents poll receiving a 0

                    // timeout value, which would result in it returning immediately.

                    pollTimeoutMs = -1;

                    // The refill delay has elapsed during the period between poll invocations.

                    // We will now check for any currently ready file descriptors before refilling

                    // the USAP pool.

                    pollTimeoutMs = 0;

                    mUsapPoolRefillTriggerTimestamp = INVALID_TIMESTAMP;

                    mUsapPoolRefillAction = UsapPoolRefillAction.DELAYED;

                } else if (elapsedTimeMs <= 0) {

                    // This can occur if the clock used by currentTimeMillis is reset, which is

            }

            if (pollReturnValue == 0) {

                // The poll timeout has been exceeded.  This only occurs when we have finished the

                // USAP pool refill delay period.

                // The poll returned zero results either when the timeout value has been exceeded

                // or when a non-blocking poll is issued and no FDs are ready.  In either case it

                // is time to refill the pool.  This will result in a duplicate assignment when

                // the non-blocking poll returns zero results, but it avoids an additional

                // conditional in the else branch.

                mUsapPoolRefillTriggerTimestamp = INVALID_TIMESTAMP;

                mUsapPoolRefillAction = UsapPoolRefillAction.DELAYED;